Malicious PDF — malware analysis report

Static analysis result for SHA-256 31894955241596b7…

MALICIOUS

PDF

73.8 KB Created: 2020-08-07 22:28:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aa56058ae6bbe41957615c43ac125e44 SHA-1: 22ad64800355160278a71ad30b018830fcd03814 SHA-256: 31894955241596b79e448f3d52ca36410e17f8dc7d9d8442e19f0d9dca3a52c6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous links, many of which point to a link farm hosted on Shopify. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=algorithms+in+real+algebraic+geometry+pdf'. This suggests the document is designed to redirect users to malicious sites under the guise of providing a PDF document. No scripts were extracted from this sample.

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=algorithms+in+real+algebraic+geometry+pdf In PDF document text
    • http://files.stkjustlabskennel.com/uploads/1/3/0/8/130814284/4461677.pdfIn PDF document text
    • http://files.sandytoessociety.org/uploads/1/3/1/4/131438142/vuxex.pdfIn PDF document text
    • http://files.singaporedrumshop.com/uploads/1/3/1/8/131857818/79491fe8c8684.pdfIn PDF document text
    • http://files.theghostdidit.com/uploads/1/3/0/9/130969879/pakijiburizuvuwan.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/1/0432/8492/2526/files/44053222082.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9086/8379/files/gobijonowixulusol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9544/8997/files/fewowive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5152/4008/files/nebajusetetiwajewupow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0444/3299/files/tifotubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8277/6725/files/71261280952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/mexevenu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8512/8090/files/41106924222.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2214/0063/files/dimikosawepogejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/beronijotuta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2391/7478/files/36471030850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/76236152417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2141/7122/files/examples_of_non_vascular_plants.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8052/3678/files/pasikakopewaxedip.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 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_off0000dea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA5 5800 bytes
SHA-256: 00e1aacec7119e4e2bc3292c07ff7be7dc1ac53f84aa5234631a421fc6570350
font_01_sfnt_off0000f245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF245 12040 bytes
SHA-256: f2843a785b38ade784c9a42f9afc0a5e97973e6d295ec67dc4530bfb28e7ad1f

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