Malicious PDF — malware analysis report

Static analysis result for SHA-256 81ae231ae921df1e…

MALICIOUS

PDF

78.4 KB Created: 2020-08-25 15:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6997e7cb5f26411e56ceaa2dea4da77c SHA-1: 44db9b171a773855292d2e0188865b58f9f16284 SHA-256: 81ae231ae921df1e5ee68fb0f8837d9c0fda8ba499f6ae2dc2a6337bcb1a7877
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links that redirect to a known malicious infrastructure, specifically `https://ttraff.ru/pify?keyword=bhojpuri+video+film++2018`. This suggests a phishing or scam attempt, likely using the document body's text as a lure. The presence of numerous external PDF links also indicates a link farm, a common tactic for SEO manipulation and distributing malicious content. The ML classifier strongly supports the malicious verdict.

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=bhojpuri+video+film++2018 In PDF document text
    • http://wixivudaf.wileyreads.com/uploads/1/3/0/7/130775643/dubafi.pdfIn PDF document text
    • http://files.cookwithjames.com/uploads/1/3/0/7/130739340/8638391.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/1/0428/7227/5103/files/gosefubuzamoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/duduke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8076/2023/files/43871114136.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6487/6453/files/barriers_to_social_change.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2613/6743/files/2856873937.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2503/8497/files/93241118125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3583/6063/files/cellulose_acetate_membrane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6010/9210/files/tunajujokesewuxire.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: cookwithjames.com 4 samples

Related samples 4

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_off0000e6e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E4 5296 bytes
SHA-256: 10006d7b9e83906ff20996c0235004c1afc8ebb02438afcaaa6629ae0aeb8d95
font_01_sfnt_off0000f8f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F8 11544 bytes
SHA-256: f39cc16eded3cc9e35a5706359a49a92881a9efa5f7ab32dcf5a5c11efedf4c9
font_02_sfnt_off00011ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECD 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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