Malicious PDF — malware analysis report

Static analysis result for SHA-256 80f17a5fe487bf76…

MALICIOUS

PDF

57.8 KB Created: 2020-10-15 06:32:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 152fed19ac0732568574873f94758708 SHA-1: 355866a55445dc6646aa5638e43acc8154c02eb2 SHA-256: 80f17a5fe487bf767831ee6b371a0d974df67e0bc7409c1497b75e29ec61bdbf
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document functions as a link farm, directing users to numerous external websites, including a known malicious redirector at `https://cctraff.ru/123?keyword=best+android+games+2020+quora`. The document's content and structure strongly suggest a phishing or SEO poisoning attack, aiming to drive traffic to potentially harmful sites. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cctraff.ru/123?keyword=best+android+games+2020+quora In PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/kinufijozulof.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/vovapoxupileve_roxemav.pdfIn PDF document text
    • https://fadusoga.weebly.com/uploads/1/3/0/7/130739873/mafezoluruzowez.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/pemuvavekenurikamik.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/2a5b38eef3430.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5f879f44b1c04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f87100b94ebb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5f8771bec8b4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f86f8e69a610.pdfIn PDF document text
    • https://site-1038601.mozfiles.com/files/1038601/bumuwurifuremidaxinogod.pdfIn PDF document text
    • https://site-1039617.mozfiles.com/files/1039617/sevoterokej.pdfIn PDF document text
    • https://site-1040006.mozfiles.com/files/1040006/76703079941.pdfIn PDF document text
    • https://site-1037202.mozfiles.com/files/1037202/jinos.pdfIn PDF document text
    • https://site-1042725.mozfiles.com/files/1042725/music_pro_premium_apk.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/kadupe_ripovu_jozovagazemewe.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/jolon_koxuzozudanik_makilitinami.pdfIn PDF document text
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/buwazefuladu.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/5452898.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/2d3fd89cd47432a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7456/7843/files/zimikosafalexazide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3340/6871/files/tasco_10x42_binoculars_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3516/2786/files/gekanurab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5158/9018/files/poisson_ratio_abs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/282faf22-8c8c-4714-a1ef-0cc20d85a690/viniriguzi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/207ebe3a-7db6-422d-8db4-40e9b1803a9d/37311166801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75797556-78b6-41a9-b8dc-bc54b4447d23/44911534394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ee18625-ac09-4ab6-a478-adc3694b42ef/damam.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000083b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83B9 5444 bytes
SHA-256: bf63e15c990dbbb1d12cbdc50f99a746fe0757e03d9e6bc01e412ceda3c3b745
font_01_sfnt_off00009613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9613 10580 bytes
SHA-256: 8617691c1218bf74e0930e78800983dbcf17deb975d2d77023b070d9531549dd
font_02_sfnt_off0000ba49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA49 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
font_03_sfnt_off0000c84a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC84A 4336 bytes
SHA-256: 7d4a6d826a09df274cd0edf23e2c4bacf6b33ddad7bdec7dbfe415dcc423ec4e

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