Malicious PDF — malware analysis report

Static analysis result for SHA-256 82807d81f3de7390…

MALICIOUS

PDF

50.0 KB Created: 2020-08-08 17:35:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a7a0c38ae0d46f9ba03c54bdd164a027 SHA-1: 6d0f1eab35d8b72dbdd687c6a6b4a409d0597fc9 SHA-256: 82807d81f3de7390e6b168b82ad508582daead8992ae40ec7726e8e748b864b4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple embedded links, with a primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, also contains this redirector URL, suggesting a phishing or scam attempt. The ML classifier strongly indicates maliciousness, and the presence of a link farm further supports the malicious intent.

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=agree+disagree+essay+structure+pdf In PDF document text
    • http://sujepo.quantrylaneart.co.uk/uploads/1/3/0/7/130776460/a63f386.pdfIn PDF document text
    • http://files.claremooredesigns.com.au/uploads/1/3/0/9/130969037/d8e53f.pdfIn PDF document text
    • http://livoz.talesbyataillesscat.com/uploads/1/3/1/3/131380480/getukigomu-vomaniviv-sexolewunekapa.pdfIn PDF document text
    • http://files.brockskennel.com/uploads/1/3/2/8/132816195/abd7f.pdfIn PDF document text
    • http://files.ragbagantiques.com/uploads/1/3/0/9/130969469/8169755.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/1/0431/0705/7825/files/kambikuttan_novel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9476/9821/files/17954158695.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0911/3240/files/pezamisamegusavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7651/8049/files/77616902400.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3765/4178/files/jazizulepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4091/3046/files/78047967040.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7666/3961/files/86812993214.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/77214252917.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/levaxanurupuxetojike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3382/9277/files/67262395743.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/printable_expense_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9755/5108/files/luzigolatamep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1540/4695/files/44444093902.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7255 5048 bytes
SHA-256: d6b959593ae9e11b8bbbe7731bdc77186b7d2e092d181218bbdde093b110b80e
font_01_sfnt_off000083a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A6 15092 bytes
SHA-256: a2bfef6ea56383eafeabefb50b67e65b09a637438d76214ba5075bba3331d28b
font_02_sfnt_off0000acf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACF8 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3