Malicious PDF — malware analysis report

Static analysis result for SHA-256 10b44d2421f34417…

MALICIOUS

PDF

46.1 KB Created: 2020-08-12 09:01:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8a950191d675c0cafc59e32339d84ab3 SHA-1: f230757e163a6b2252e00da0d94cf6ec29454f8b SHA-256: 10b44d2421f34417d6001a37cccc4c8042cab107086e4440e7a864d1bc582ab7
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one pointing to a known malicious redirector. The heuristic firings indicate this is part of an SEO link farm designed to lure users with a "free download" pretext. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the embedded links are the primary mechanism for redirection.

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.cc/pify?keyword=benzodiacepinas+en+ancianos+pdf In PDF document text
    • http://files.flyingmissionusa.org/uploads/1/3/1/4/131406885/3e9014.pdfIn PDF document text
    • http://files.adventurehorizons.com/uploads/1/3/0/7/130739344/35c7529d23d.pdfIn PDF document text
    • http://files.felicitasdoula.com/uploads/1/3/0/7/130776589/7122715.pdfIn PDF document text
    • http://zurin.benbodnarfilms.com/uploads/1/3/1/4/131453541/9872883.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/1/0429/7592/0282/files/petopekuvefede.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/64157011411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3662/2498/files/53476444542.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6856/3351/files/mizogizokenazivapol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7181/3285/files/pofogesesegov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7196/2269/files/avalon_hill_d_day_rules.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5371/0493/files/85635078964.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/80793893357.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9706/2564/files/ziferibojesozajisaxen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5314/5495/files/80966575586.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
🗂 Part of campaign: flyingmissionusa.org 3 samples

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_off0000751e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x751E 5120 bytes
SHA-256: b91b54ce697ca4a80e09e3fb2a55a77a57f2f6023b12bedbbc422d8e69c09e84
font_01_sfnt_off000086a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A3 10976 bytes
SHA-256: 92fcfd3dd04e53a78404f08e29a1af4d445bccd6d600accfa8a703589d826dcf

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