Malicious PDF — malware analysis report

Static analysis result for SHA-256 d493c4f150b6ba5e…

MALICIOUS

PDF

40.9 KB Created: 2020-08-23 16:41:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 20348f98b5833b2983ba2997be6a5bdd SHA-1: 1b0a9dcde58d7f04625b19ced1b01157cb0a4af1 SHA-256: d493c4f150b6ba5efc271dae1efc1e047b4df5742001a618b2201336a57aa1cb
194 Risk Score

Malware Insights

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

The PDF document is designed as a lure, promising interview-related content to entice users. It contains embedded links, with one pointing to a known malicious redirector at 'ttraff.ru'. Additionally, it features a link farm with numerous PDF links, many hosted on Shopify, likely for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness.

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=interview+questions+and+answers+for+marketing+assistant In PDF document text
    • http://files.elambaptistchurch.net/uploads/1/3/1/3/131378918/85c49b0.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/1/0439/0594/1672/files/22450645881.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1663/4016/files/42961945730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2741/2645/files/56022415775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8126/1466/files/pathfinder_core_rulebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2456/1829/files/au_bonheur_des_dames_emile_zola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2123/6384/files/71824502676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2151/6449/files/4228993799.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8277/6729/files/judegezujozajazek.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6237 5472 bytes
SHA-256: 88c26b6aa0d883ebbf0221a6b27e912f0806bd8517f081a76a91e26c07dcba96
font_01_sfnt_off000074cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74CF 9976 bytes
SHA-256: 98839b9b4a1f891f1be955261102f71f5613467c58998ede177c4ba9a74f7647

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