Malicious PDF — malware analysis report

Static analysis result for SHA-256 898c54febd1f3fa9…

MALICIOUS

PDF

40.5 KB Created: 2020-08-19 08:16:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0591276d91e97a9624dd5969d05e4c28 SHA-1: f7a3f57478cf88cc014b5f9208985cfaff16fe24 SHA-256: 898c54febd1f3fa9e7fc34c001ef4a7205580019421a95640f58a11b9b128e54
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to redirector services, including one that masquerades as a Caterpillar Inc. annual report. These links ultimately lead to a link farm of other PDFs, suggesting a phishing or malware distribution campaign. The ML classifier also strongly indicated maliciousness.

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=caterpillar+inc.+annual+report In PDF document text
    • http://lidebu.oliviergueant.com/uploads/1/3/1/0/131070487/118571.pdfIn PDF document text
    • http://gasopev.stillyriveryarns.com/uploads/1/3/0/7/130738884/bigul.pdfIn PDF document text
    • http://files.valleyrootsfoodhub.com/uploads/1/3/0/7/130740344/fa8b50ce.pdfIn PDF document text
    • http://mizoral.rugbysafetynetwork.org/uploads/1/3/2/8/132814930/gelukorevopapuwujila.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/1/0438/5164/5093/files/85543389999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6124/7129/files/99606620697.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1910/6466/files/firestick_remote_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5108/2143/files/viwigubotidarir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/chemistry_acid_base_neutralization_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/4237/7623/files/rizezavexanola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7663/2220/files/75931640943.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3771/8690/files/36015864220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/annihilation_of_caste_book_in_marathi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9892/2392/files/masijapimere.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_off00006185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6185 4684 bytes
SHA-256: 0d7933b54632d0513b59c13461b660a576157067395e9e2f581753a58778e643
font_01_sfnt_off0000717e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x717E 10420 bytes
SHA-256: 4b2f00a999912ff693dbf4318e8b312bb0682e1cbe2cf9fb59b8964f7ff068a0

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