Malicious PDF — malware analysis report

Static analysis result for SHA-256 22f7b3aacaf95279…

MALICIOUS

PDF

43.0 KB Created: 2020-08-10 22:06:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b86f25906182707ecfbe319f05bfabe7 SHA-1: 34a15600a4b9bd96f4e1db0a8391d78132dab61d SHA-256: 22f7b3aacaf9527976cd7996a0ddaeef4fa3fc978c84deee4c43d953557eb2c4
194 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, a common technique for SEO poisoning and redirecting users to malicious sites. The primary malicious URL identified is ttraff.ru, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Acca f5 study guide pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also 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=acca+f5+study+guide+pdf In PDF document text
    • http://files.nicolainickson.com/uploads/1/3/1/3/131378942/297f233a35e2ec.pdfIn PDF document text
    • http://files.cityxlab.com/uploads/1/3/1/4/131411281/5848899.pdfIn PDF document text
    • http://files.futureplanning.org.uk/uploads/1/3/1/3/131384573/5875012.pdfIn PDF document text
    • http://files.iwstreecare.com/uploads/1/3/2/7/132740479/wogupu-zukokitoruwogog-zikezugufada-pubuzesilas.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/1/0434/6229/5714/files/mexexibonuwadawar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/digalikerewuxajevukadud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2656/9633/files/sekiro_mask_fragment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1024/4260/files/xubenejudodedu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/casti_guidebook_to_asme_section_ix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4614/1093/files/43619518314.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/vulumaxegusekeliri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/26543292937.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8649/5400/files/13671407761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3824/5017/files/75590743066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3249/4751/files/mawesoboxeja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1615/9395/files/76356410687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8099/1395/files/dulugusamos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/mobile_ad_hoc_networks_lecture_notes.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_off00006941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6941 5408 bytes
SHA-256: 627f0a191021364ffff814df14b37ad7a36e251804849750019d86db3ed5ac71
font_01_sfnt_off00007bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC6 10352 bytes
SHA-256: dc9ec1ec849eb80b799c6629e923571fcaa5f7c77645ef583905e1ca89f97b90

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