Malicious PDF — malware analysis report

Static analysis result for SHA-256 a313f98f147fe05d…

MALICIOUS

PDF

52.5 KB Created: 2020-08-15 08:19:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c72b501e69726400af0670a49cc8773c SHA-1: 371034d52265591c22ec564eb969877ccfbdc509 SHA-256: a313f98f147fe05dee14ca47e84e8941fd98939a8cc78a259640e114556adb0b
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a fillable employment contract. The PDF also hosts a large number of links to other PDFs on Shopify domains, likely for SEO manipulation to improve search engine ranking for malicious content. The ML classifier strongly indicates 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=arbeitsvertrag+pdf+ausf%25C3%25BCllbar In PDF document text
    • http://serodi.waugheconomics.com/uploads/1/3/0/7/130775735/d688d1479c4.pdfIn PDF document text
    • http://wivujiko.radmanusa.com/uploads/1/3/1/6/131607163/cb64a0189ceb.pdfIn PDF document text
    • http://files.subterfuge-au.com/uploads/1/3/0/7/130775604/wabajolobi-salokuwimiwi.pdfIn PDF document text
    • http://files.talithakumthailand.org/uploads/1/3/1/0/131070866/5641425.pdfIn PDF document text
    • http://files.southernoboeintensive.com/uploads/1/3/0/7/130739883/zowivam_fopapunosolepan_siwosoponaz_putoruferos.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/1/0433/9892/2403/files/83153372109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/fiselewimunanofapesone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2644/7525/files/rabukikojopazaruxijevuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15501301831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5855/1189/files/d_d_race.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3453/2245/files/66131976535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1064/6435/files/barazisefunakep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3952/8872/files/aleppo_codex_matti_friedman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4654/1211/files/82057384905.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 3

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_off000083ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83EA 5516 bytes
SHA-256: 3da8b8a2d25dae61c646aa4be03b9c2622f22d5904ac58769da7bfd7e2215664
font_01_sfnt_off00009686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9686 14564 bytes
SHA-256: 09a527a6f7be210504e7e9737b97e998cdd6449bdf579fca1e4bdf7ed30fec30

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