Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c6b991ef9b60579…

MALICIOUS

PDF

42.5 KB Created: 2020-08-20 08:40:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 305f31af8a3ebf9392f9c251a56ade50 SHA-1: deea203a291ad77dae84268cb5ecdf564d5335db SHA-256: 5c6b991ef9b605790a53b96eb0e8038a279e8d7ea00d072ca9eba5e7ec86d003
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a redirector URL disguised as an application form, indicating a phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious. The embedded URLs, particularly the one pointing to 'ttraff.ru', are associated with malicious redirector infrastructure.

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=arizona+state+university+application+form In PDF document text
    • http://files.alanbazin.com/uploads/1/3/0/9/130969762/wexubewofumosadeta.pdfIn PDF document text
    • http://files.shineforfiveboutique.net/uploads/1/3/1/1/131163898/7639e0c67378e8a.pdfIn PDF document text
    • http://files.woodworkslexington.com/uploads/1/3/2/6/132681772/lapiwig-lemurivelitaro-revapero-mukatomudugeluz.pdfIn PDF document text
    • http://files.rijkewijnen.nl/uploads/1/3/1/8/131871488/8222942.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/1/0463/2723/4722/files/bezeragoza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/fazopod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5025/1941/files/94415969138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9877/6487/files/52801492908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7614/8643/files/matricom_g_pad_ex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6490/1270/files/lezafe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5343/9383/files/25022247891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3776/9384/files/crise_argentina_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/26755149975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6626/9597/files/all_accounting_definitions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/7822/1729/files/dieta_atkins_italiano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4143/1464/files/pudofovabefuv.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_off0000666f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x666F 5360 bytes
SHA-256: 99f789fe705ef2865cb3061388c6695af2fb591a8b5133ce428d70d8e151aaaf
font_01_sfnt_off000078a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78A7 10636 bytes
SHA-256: 936ad87238e7cf40fcc8c74723dc15ab0c747c5e0fe5f8838e0ddff9a3525a31

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