Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2afc3ac4cffb221…

MALICIOUS

PDF

46.0 KB Created: 2020-07-09 23:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 47080295b274c9266a0419bfad201c14 SHA-1: 9a73481ff0bb52b4fde42c7cc6922ec3be1774a1 SHA-256: f2afc3ac4cffb221636222e4bb007436cdcbf64862e7b48aa4d71e0518dfdbb3
184 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body also contains the same redirector URL, suggesting it is the primary lure. The presence of numerous SEO-like PDF links indicates a potential link farm or SEO poisoning tactic to distribute malicious 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://ttraff.cc/wb?keyword=pitman%202000%20shorthand%20pdf%20download In PDF document text
    • http://files.northparktrailrunners.com/uploads/1/3/1/0/131070459/senabawenapibuseti.pdfIn PDF document text
    • http://files.aulsc.org.uk/uploads/1/3/1/3/131379115/3603c7d82.pdfIn PDF document text
    • http://files.humblemonkbrewing.com/uploads/1/3/0/9/130969085/419f53.pdfIn PDF document text
    • http://files.designsbydebllc.com/uploads/1/3/0/8/130814337/wadalinilezi.pdfIn PDF document text
    • http://files.just-verandas.com/uploads/1/3/1/3/131379045/xobuxisedujus_wekabod.pdfIn PDF document text
    • http://files.paintthetv.com/uploads/1/3/1/8/131871956/2491566.pdfIn PDF document text
    • http://files.alinoraboutique.com/uploads/1/3/1/4/131409909/70d04.pdfIn PDF document text
    • http://files.christiestimber.com/uploads/1/3/2/3/132302815/a80bec9c772bc.pdfIn PDF document text
    • http://files.haywardfitnessfanatics.com/uploads/1/3/0/8/130874413/dugen.pdfIn PDF document text
    • http://files.merarifernandez.com/uploads/1/3/1/4/131407165/6839308.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://lakuvipejuz106751964.files.wordpress.com/2020/06/50252421251.pdfIn PDF document text
    • https://pikilaguse.files.wordpress.com/2020/06/woruxavimalutoludife.pdfIn PDF document text
    • https://dafutinak.files.wordpress.com/2020/07/berafuxolimepawavudeg.pdfIn PDF document text
    • https://fivitulid.files.wordpress.com/2020/07/mamizuj.pdfIn PDF document text
    • https://detixuge.files.wordpress.com/2020/07/60768154804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gidawibozifuniji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28650507632.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50878135704.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_off0000766a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x766A 5316 bytes
SHA-256: 001ef1647cd7381ab948741d16ba1d6537bb99956d7e8ce57c664deed70726e7
font_01_sfnt_off00008848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8848 10128 bytes
SHA-256: 1b176dbd025b1c023e6be59cf2adc4cb4f6bad7d065ab19ccfa75d3d64462de3

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