Malicious PDF — malware analysis report

Static analysis result for SHA-256 875ee9e959c44a21…

MALICIOUS

PDF

34.8 KB Created: 2020-08-10 03:07:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9384bad3a324091b3a931f4ced5d1a8a SHA-1: 6196de1c25c80cd0f29fcdfbc9a8215f87b285bf SHA-256: 875ee9e959c44a21532249215ac0d3321e16bfdcf1c464e8e69e7206ef2e2694
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service known for hosting malicious content. The document body, though heavily obfuscated, contains the primary redirector URL, suggesting an attempt to trick users into downloading further malicious content or visiting a phishing site. 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.ru/pify?keyword=laboratorio+caida+libre+pdf In PDF document text
    • http://files.archibalddentalassociates.com/uploads/1/3/2/6/132682585/tasigidilut.pdfIn PDF document text
    • http://files.lasalleyouth.ca/uploads/1/3/0/7/130775393/5123828.pdfIn PDF document text
    • http://files.jessicaleeman.com/uploads/1/3/1/3/131381363/84b0ddd.pdfIn PDF document text
    • http://kanago.ablackrose.org/uploads/1/3/0/8/130874474/texaw_kidunaxuja.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/1/0427/6633/6167/files/54395281316.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3359/9893/files/ziladabewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1653/1617/files/general_cognitive_ability_test_telkom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6911/0432/files/pimatapimexijosopug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2215/5930/files/80162051031.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2671/6584/files/84011873204.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1777/0904/files/sepuweb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0439/4646/files/fozubomijezaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7885/2507/files/tigezemazeletebuwedoko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0646/6975/files/aachen_travel_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2656/2722/files/webmail_wfhc_org.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/9037317801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5888/6806/files/53181747449.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2639/0933/files/kenmore_heavy_duty_70_series.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6464/7077/files/kigogi.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 4

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_off00004cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CC2 5052 bytes
SHA-256: ff08dbd9668b9b3e9e1540bbe57395b8e563db81a6a8036a74a6a004cde9e77a
font_01_sfnt_off00005dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFA 9764 bytes
SHA-256: 10b68efe2223e5ba761ef9a34c122b360675040138f2ff0ed89100b0a21de5e7

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