Malicious PDF — malware analysis report

Static analysis result for SHA-256 815a032d0a86a2c1…

MALICIOUS

PDF

59.5 KB Created: 2020-10-26 05:39:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2a9800587bc7b6d7c1153e1326646b32 SHA-1: 9adc55769c0c1c5dd7877f08ef575e758eb04a5b SHA-256: 815a032d0a86a2c11887da5b34d1f68226375597815436a80175c0802cdeca45
184 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links pointing to various websites, many of which are hosted on disposable domains. The heuristic firings indicate that this is a malicious redirector link farm, likely used for SEO manipulation or to distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://gettraff.ru/123?keyword=globalization+and+communication+technology+pdf In PDF document text
    • https://kogatakuzomaw.weebly.com/uploads/1/3/4/4/134444425/5c7d15a08.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/83905a54a030772.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/fubisi.pdfIn PDF document text
    • https://vozutadisifik.weebly.com/uploads/1/3/1/4/131483249/9186477.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/zodujudaride.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/vevimi-zamijepuxikuzab.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/dozafawegikuxoto.pdfIn PDF document text
    • https://rokejowavati.weebly.com/uploads/1/3/4/2/134265467/3003e.pdfIn PDF document text
    • https://kizuwapeputatu.weebly.com/uploads/1/3/4/3/134375201/3238dadae8.pdfIn PDF document text
    • https://lidenezat.weebly.com/uploads/1/3/4/3/134382714/c5d3d7c2608.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/8286b3e2e4d.pdfIn PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/joroxezipabiju-poberakin-zigifaturevoled-vodedokotopidam.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
    • https://uploads.strikinglycdn.com/files/f04592f4-9d9d-4500-892e-559b57f71263/kugosuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4f14d0d-4f43-4812-8f67-06932dc9008b/25593172591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/314e3079-175a-4dd0-bed3-5daa1f8bce56/pazarasimomivexinake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6120/5924/files/pixel_gun_3d_hack_tool.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7304/4642/files/world_of_warcraft_xbox_one_controller.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3901/4562/files/forensic_anthropology_training_manual_burns.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5155/6260/files/family_giving_tree_backpack_drive_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4161/8082/files/strong_versus_weak_acids_pogil_worksheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009a45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A45 5500 bytes
SHA-256: 50ebae2bba52ec0d7c388d9f65dcb50537bed4bda23c1a8f6515bb6f5d38c95d
font_01_sfnt_off0000ace7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACE7 11380 bytes
SHA-256: 9340fe161041cadfc12ee60d59177561bbb278953f02193a081691e4029fec2d
font_02_sfnt_off0000d21c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD21C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378