Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac139bab3fffff00…

MALICIOUS

PDF

50.9 KB Created: 2020-08-07 10:10:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: db54ee44cd95e30f82735039f5131ce3 SHA-1: ef0497ab65d27bcd86a3bbfa45a6cfd8e4a13016 SHA-256: ac139bab3fffff0047fd851e6758d800c12a05e9088946d5649fe45fb8d557ba
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one pointing to a known malicious redirector at 'https://ttraff.com/pify?keyword=karl+marx+conflict+theory+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The presence of numerous other links to Shopify-hosted PDFs indicates a link farm strategy to improve search engine visibility for malicious content.

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=karl+marx+conflict+theory+pdf In PDF document text
    • http://files.mainstreetfremont.org/uploads/1/3/1/6/131606392/7f23bd077.pdfIn PDF document text
    • http://files.kpdministries.com/uploads/1/3/1/3/131379183/959fbec.pdfIn PDF document text
    • http://files.ripsandtears.com/uploads/1/3/0/7/130739099/e67446.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/negopolikutowuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7099/7151/files/17202982293.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/tulapiduretivimafadozub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7514/1783/files/vujoruz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7165/8389/files/jozazikenunudof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/noxakodamesagadoxevejes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9832/5671/files/steel_manual_15th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0005/3408/files/60048230995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4520/7714/files/lidejonemis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/mujalasudewiseguxiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8609/4229/files/83654047672.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 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C51 5144 bytes
SHA-256: d6d93aa5c156652c3f2048b2e708b93a1be9f93454a9a107de5aa826c184a348
font_01_sfnt_off00008daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DAF 10272 bytes
SHA-256: 9c72cf186fe7331e19cf23e1608f9582eb618813146a93fc1d636a987a40128e
font_02_sfnt_off0000b0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C5 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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