Malicious PDF — malware analysis report

Static analysis result for SHA-256 90477b8dd65cce9f…

MALICIOUS

PDF

42.2 KB Created: 2020-08-17 02:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ab6b21c8b2fbb62d821e6222847c2166 SHA-1: a5dfae96e61261ec6840af3b8569c8b5e55dc681 SHA-256: 90477b8dd65cce9f56b6e5d8227c220add4a62fa57f064c7fbf336b50eca8bc6
194 Risk Score

Malware Insights

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

The PDF document contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Bibtex file reader free' and the malicious URL, suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to distribute malicious content. No scripts were extracted from this sample.

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=bibtex+file+reader+free In PDF document text
    • http://files.ghostandribbon.com/uploads/1/3/1/4/131406222/5e84660bb90d7af.pdfIn PDF document text
    • http://files.dinarchronicles.com/uploads/1/3/0/9/130969987/82eefe5c8f.pdfIn PDF document text
    • http://files.pianorentaldc.com/uploads/1/3/1/6/131637679/wadufurawaxepolukol.pdfIn PDF document text
    • http://files.myclassicmercedes.com/uploads/1/3/1/3/131378838/vajugizu.pdfIn PDF document text
    • http://files.triadchialpha.org/uploads/1/3/1/4/131454620/liwujutujuveb-xutuponodo-vakuxege.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/1/0437/1405/2247/files/descargar_caballo_de_troya_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7103/6822/files/balun_balun_dj_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4275/7029/files/tatomosiranexaxifa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3448/2587/files/structure_of_alveoli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8738/7037/files/19761690620.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2629/2634/files/duturakemefiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8544/6824/files/fixekexavabumonemux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1333/3411/files/tunetalararix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/pekokavagogexoxawemaka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/5532/2012/files/xamukizikivet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6239/4008/files/manual_brick_making_machine_construction_plans.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8721/5269/files/kim_mele_methow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8502/8758/files/18249710277.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_off00006415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6415 4980 bytes
SHA-256: d7a7395b6a7c3a36523f47dadc88b88f6b4aa09e049a035ecb474796b707dbd3
font_01_sfnt_off00007512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7512 11332 bytes
SHA-256: b425cc7add2df74e79838dc44a467fcee78132d5912478bf3ddffa5e8e8ee2bd

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