Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac1912d1e6b14756…

MALICIOUS

PDF

40.7 KB Created: 2020-09-29 10:17:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cbff6cbf3b7fa2a74852d0d048003030 SHA-1: 99bb33ff5626b9b8e834a4c5ef270fea88ab5c36 SHA-256: ac1912d1e6b147566d16859a4b7fc68c366951e8c3d6b6791342a48fba239da0
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

This PDF file exhibits characteristics of a link farm, embedding a large number of external links. One prominent link points to a known malicious redirector, suggesting a campaign to drive traffic to malicious infrastructure. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body contained mostly obfuscated or metadata-like content.

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/mozel?keyword=endodontic+access+cavity+preparation+pdf In PDF document text
    • https://site-1036880.mozfiles.com/files/1036880/67633274415.pdfIn PDF document text
    • https://site-1036909.mozfiles.com/files/1036909/degakudubuxagajaluk.pdfIn PDF document text
    • https://site-1036621.mozfiles.com/files/1036621/77798592689.pdfIn PDF document text
    • https://site-1036798.mozfiles.com/files/1036798/lulaterikexurupapunige.pdfIn PDF document text
    • https://site-1036923.mozfiles.com/files/1036923/78774609471.pdfIn PDF document text
    • https://site-1036835.mozfiles.com/files/1036835/56728202216.pdfIn PDF document text
    • https://site-1036944.mozfiles.com/files/1036944/melizogosak.pdfIn PDF document text
    • https://site-1036834.mozfiles.com/files/1036834/72932364891.pdfIn PDF document text
    • http://makixa.taurimufarm.net/uploads/1/3/1/3/131379803/safajojon.pdfIn PDF document text
    • http://files.aromatsubo.com/uploads/1/3/1/4/131406505/dc825b605aac68.pdfIn PDF document text
    • http://fupamoj.artistscorner.gallery/uploads/1/3/2/6/132682110/latapedopinax_vuborijevevanad_xigijewexotaxo.pdfIn PDF document text
    • http://fidaje.tripredefined.com/uploads/1/3/2/6/132682883/9334076.pdfIn PDF document text
    • http://bumuto.enotecaathena.com/uploads/1/3/1/3/131381130/xefop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/0332/7142/files/restaurant_management_training_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8797/8913/files/silalilobaf.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_off00006194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6194 5236 bytes
SHA-256: ab38b8448a7da1f3427bd46eb41297a5857c3b149212ce2c24736ed689e7e5bf
font_01_sfnt_off00007387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7387 10100 bytes
SHA-256: 3db0527f4b509d72d2e84aebc4f802a993ff0c8f89d5c7c32f555148a424ed31

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