Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f9d95ee9f294d25…

MALICIOUS

PDF

42.1 KB Created: 2020-08-27 19:05:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0d53921e5a63da4a2c474734015a4856 SHA-1: 765749427d43c4d8118f0d6967e522a75a1d97ef SHA-256: 4f9d95ee9f294d25403e6f0ce6b9dc8b3db0b11c7bd3f8a3ed6ea8a527307d15
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, indicative of SEO poisoning or a phishing campaign. The primary malicious URL identified is https://ttraff.ru/pify?keyword=mecanica+de+suelos+ingenieria+civil. The document body contains obfuscated text and numerous URLs, further supporting the malicious nature of the file.

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=mecanica+de+suelos+ingenieria+civil In PDF document text
    • http://walisaf.al-anon-ulster-sullivan-ny.org/uploads/1/3/0/7/130775432/2058836.pdfIn PDF document text
    • http://files.juliancooper.com/uploads/1/3/1/0/131070109/4371710.pdfIn PDF document text
    • http://dopil.aliveandwellband.com/uploads/1/3/1/4/131453624/pudowajataked.pdfIn PDF document text
    • http://files.mcarpedi.com/uploads/1/3/0/7/130776220/mujadawexokinemi.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/1/0431/6787/5221/files/apostrophe_worksheet_grade_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/8101/4936/files/lovevuribizapipuvidumabul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4012/0733/files/buxajozigokexogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5709/4551/files/what_does_enchant_mean.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5124/5987/files/93775625778.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2571/0752/files/pupufoxivazepazalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/shurflo_4008_101_a65.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/naretub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/7847/7976/files/odisha_pin_code_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4451/1645/files/56365441713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8572/5850/files/85835068002.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_off00006677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6677 5172 bytes
SHA-256: bf511fbd50b31c2f4671b3e4fab77c4baadee9ef0364959df3defe5f0ef80a65
font_01_sfnt_off00007820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7820 10340 bytes
SHA-256: 6e37aa48c445b81a497c3283f063fb502534f4ab8b46994f5276a67cc7b3a077

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