Malicious PDF — malware analysis report

Static analysis result for SHA-256 f58934e1c44c0bb4…

MALICIOUS

PDF

50.0 KB Created: 2020-08-03 12:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2c1acbca2f187bed42d1bf929b536252 SHA-1: 90d09ca495037b893ca020fdc43cf85f8efd6e08 SHA-256: f58934e1c44c0bb4d55d15b57c903d40666e5931bd303feb8600db44ca7453fe
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a "matrix math pdf" and hosts a large number of external PDF links, characteristic of a link farm. The ML classifier strongly indicated maliciousness. The primary malicious IOC is the redirector URL.

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=matrix+math+pdf In PDF document text
    • http://files.moonspherestudios.com/uploads/1/3/1/3/131383838/zisuforutigel-vomexolokonenon-xizujabufaz-jisumegu.pdfIn PDF document text
    • http://files.roygrayphotography.co.uk/uploads/1/3/1/8/131856531/jufepezoz.pdfIn PDF document text
    • http://files.rspfitness.com/uploads/1/3/2/6/132681476/19acc74241.pdfIn PDF document text
    • http://files.nkp.rocks/uploads/1/3/1/8/131857758/ff2ce69fb23a.pdfIn PDF document text
    • http://files.exuviateesthetics.com/uploads/1/3/1/6/131607522/jabob-lanazu.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/1/0431/9808/7328/files/speech_trainer_skyrim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7986/8309/files/nozaxuvalebugozoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0298/6659/files/68138743103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/73013639530.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/rusig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/sebobakixej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8991/1194/files/xelelojavatutikok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0862/1719/files/dadegusemo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0691/0876/files/48468214667.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/97405556567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8579/0365/files/5783802235.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6038/8252/files/fipezuweligogipokatew.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_off00008646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8646 5144 bytes
SHA-256: a918668969b47406fc347ced9c1849220ab8fae993677d5deb048606f3f2b198
font_01_sfnt_off000097ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97AC 10360 bytes
SHA-256: 164681b532d25cae96da6558c689eeeaa4f26931014a77643945098095dfdb41

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