Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8b42cbb00e1c04b…

MALICIOUS

PDF

45.6 KB Created: 2020-08-06 13:00:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fa02f4364afdfc80625694ce8d045e3d SHA-1: ed94be29a1f20c70aab9b566249047c5dfe976cd SHA-256: b8b42cbb00e1c04b93cf3bccc761f31910f5024965aeb976674fa5feefda67e7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=angina+pdf+2020'. This indicates the document is likely a lure designed to redirect users to a malicious site. The presence of a large number of external PDF links, many hosted on cdn.shopify.com, suggests a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.com/pify?keyword=angina+pdf+2020 In PDF document text
    • http://files.firstaidresilience.com/uploads/1/3/0/9/130968917/e093b68f8a24.pdfIn PDF document text
    • http://files.vexsens.com/uploads/1/3/0/7/130775846/waforumuwanaxogudo.pdfIn PDF document text
    • http://bafipos.troop374raleigh.com/uploads/1/3/2/6/132681556/nusadapimob_neniwobarug_mijivu.pdfIn PDF document text
    • http://files.rebednar.com/uploads/1/3/0/7/130775002/3298497.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/1/0433/7061/0851/files/93000810182.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9799/0055/files/80916641873.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1619/2153/files/sobew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0131/4456/files/arifureta_light_novel_vol_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7389/6602/files/dolixezewijab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/pejonug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4976/2459/files/vapikomofolipubakude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2341/8019/files/1858137251.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3765/5191/files/50784719339.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/80673598883.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2937/2821/files/jamujaruberumafunop.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_off000074e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74E9 5164 bytes
SHA-256: d67ba14e62cffe95588ff118e354a59c356555c290e5b3ce66b94fcd15da3136
font_01_sfnt_off0000869c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x869C 10468 bytes
SHA-256: d1fa82bf41cee209429a3b63cb88e6227e17e259b6c61f3568d9f9a7681ba55c

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