Malicious PDF — malware analysis report

Static analysis result for SHA-256 88316f448483e545…

MALICIOUS

PDF

76.5 KB Created: 2020-12-09 20:57:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 969446cecfbfdbbdcc1cf218ce621b12 SHA-1: 074b19d3c595c4fb613c1437e0f4790bec62c39a SHA-256: 88316f448483e545692da71d25e4c4dfe149f1e73f337b96fca3d9bd644a2a0c
244 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and an ML classifier, indicating it's a phishing or redirection attempt. It contains a large number of embedded links, many pointing to disposable hosting, designed to lead users to malicious sites. The primary malicious URL identified is 'https://gettraff.ru/strik?utm_term=love+and+hate+quotes+from+romeo+and+juliet'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=love+and+hate+quotes+from+romeo+and+juliet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421940/normal_5fa90adb3675d.pdfIn PDF document text
    • https://zobirifojufegot.weebly.com/uploads/1/3/4/3/134374070/6c0a6a5c91d3904.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393889/normal_5fa423cf8e754.pdfIn PDF document text
    • https://nelizebowi.weebly.com/uploads/1/3/4/7/134734992/mamano_kixela.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/6382172.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529149/normal_5fc8080ca1c01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370309/normal_5f9bada79a56b.pdfIn PDF document text
    • https://nirawulef.weebly.com/uploads/1/3/4/3/134324477/3647858.pdfIn PDF document text
    • https://dusexitope.weebly.com/uploads/1/3/4/6/134646398/4914374.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369768/normal_5f8907e3dab7b.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/6430b988-aa2b-4522-9607-9fbdf2c85ca9/puzzle_and_dragons_tier_list_altema.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a91cb4b9-243d-4af5-afcf-fa6abb8f5f4d/jemetonezoxovas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efa3f2c8-79c2-44f4-8628-4b3716859340/st_johns_county_planning_and_zoning_board.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/the_island_grill_menu.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_off0000dfa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA2 5232 bytes
SHA-256: 31e021073b6324c71176d74eaf49960f6d34337780caae453382b3ce028e261b
font_01_sfnt_off0000f142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF142 11152 bytes
SHA-256: 457bbcc79333111befc36731a74a548beb6361deaeb8c6a4c8e67192f52150de
font_02_sfnt_off000116e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E5 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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