Malicious PDF — malware analysis report

Static analysis result for SHA-256 df8c22a822c899eb…

MALICIOUS

PDF

64.4 KB Created: 2020-08-09 18:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fbd5ab5be3abdc2ceb0bf9615e9d8753 SHA-1: 3e022351a827587aa2c5919f87d0fa7c06524fe8 SHA-256: df8c22a822c899eb823bc08424af42b211e46e398699a85c995913b6d32fa188
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm, with the primary malicious redirector URL being ttraff.ru. This suggests a tactic to drive traffic to malicious infrastructure, potentially for SEO poisoning or other malicious purposes. The ML classifier strongly supports the malicious nature of this PDF.

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=aristotle+poetics+pdf+english In PDF document text
    • http://motozubex.phenixid.com/uploads/1/3/1/4/131453870/lemotosir.pdfIn PDF document text
    • http://files.inspirational-quotes-about-life.net/uploads/1/3/2/3/132302718/ragulida.pdfIn PDF document text
    • http://files.gceamsea.org/uploads/1/3/2/8/132816066/803104.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/1/0428/4488/1059/files/90612691975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8916/4440/files/lutirupadasakenapipafafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7142/9016/files/penarixitijaresatupavit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9687/3885/files/xazovazetotibolanazedut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5491/5993/files/15511424872.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3928/3608/files/66059235619.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5108/1114/files/lower_back_exercises_at_home.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7093/0600/files/how_to_update_a_minecraft_server.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/15767407414.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4678/0566/files/79612504720.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5736/2584/files/asme_b31_1_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4904/9499/files/adolescent_mental_health_questionnaire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9731/7783/files/89010305940.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 5

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_off0000b32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB32D 5196 bytes
SHA-256: 52b6940b987200829f8d3b3bdeddb9ef93edb21736d0cd0a3dd35a1a35bf926d
font_01_sfnt_off0000c4db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4DB 15492 bytes
SHA-256: e2cc14d29057fcb5bf04ce8f4a3a40e3b27917223f8927e592182931896a26f4

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