Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf8a0fd0a90a7bf…

MALICIOUS

PDF

66.9 KB Created: 2020-12-01 12:03:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 64b13a3fe91afbd6584023cd095f386a SHA-1: 1ee79eb52c2cd9e0722026ead3b8110eaa648901 SHA-256: baf8a0fd0a90a7bfe6455c4195be02b694799588ebe0b5e731b98c51b0256d99
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, with one pointing to a suspicious domain ('trafffi.ru') that is likely used for phishing or malware distribution. The PDF structure suggests it's designed as a link farm to obscure the true destination of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/strik?utm_term=criminal+minds+maeve+actress PDF link annotation
    • https://sazigusejif.weebly.com/uploads/1/3/4/7/134771803/ba335fd79f25.pdfIn PDF document text
    • https://jujoxiro.weebly.com/uploads/1/3/4/8/134875196/bc2283c8.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/zugabile.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382189/normal_5f8cf6779da77.pdfIn PDF document text
    • https://nofizosol.weebly.com/uploads/1/3/4/5/134500220/555095.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481270/normal_5fa891807b4ae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc11e8e16f6d44b07c01948/t/5fc47c709b1ed035386cc39e/1606712433978/jacquie_lawson_cards_sympathy.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/fakowasamo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d92d2a84-d1db-4173-ba45-4d59d2f6e6a3/vamekir.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/fast_character_sheet_creator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dfe7770-5c20-4483-8552-a61f21bbc684/93317991518.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1034da09-72ab-4600-aabb-ed8199dfdd64/77693405818.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/305db1c2-96a9-498a-b665-2cc0a95dbbc9/tyler_the_creator_wolf_vinyl.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A9 5048 bytes
SHA-256: e1315931c5aada748e29776faefcbba6ffb8dbe6bacfbbedf10f525b414d7d5a
font_01_sfnt_off0000dab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB8 10620 bytes
SHA-256: 3e0d111080dcb571c2eeb431ba95294ed0e393dc5cb5c8cd39b812eb44fa4f35

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