Malicious PDF — malware analysis report

Static analysis result for SHA-256 c454dd8a37507c90…

MALICIOUS

PDF

41.8 KB Created: 2020-08-12 13:23:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d05fea31f76864adb294d57ed4a3d97c SHA-1: a3a2f112c77fdd1743d69361ed74d4ba148b965d SHA-256: c454dd8a37507c90e2282a39227c70d0a1288fc07c6253a05382830a5cdf13a2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a reference to the same redirector URL. The presence of a large number of external links, including those to benign Shopify domains, suggests a link farm or SEO manipulation tactic to disguise the malicious intent. The ML classifier also 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=website+development+tutorialspoint+pdf In PDF document text
    • http://vakilir.teachitalian.co.uk/uploads/1/3/2/6/132695471/c026ab227c2c.pdfIn PDF document text
    • http://files.morganofriverton.com/uploads/1/3/1/4/131453695/xaliwumibedun.pdfIn PDF document text
    • http://files.blushaestheticsnc.com/uploads/1/3/1/4/131454383/wodejopu.pdfIn PDF document text
    • http://files.bowenpeters.com/uploads/1/3/0/7/130738921/pepebatanowurudopado.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/1/0438/2100/7005/files/python3_virtualenv_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/87433185299.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1059/6765/files/lincoln_ne_accident_reports.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9068/2783/files/hand_and_foot_card_game_rules.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4334/0956/files/39127293432.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9934/8389/files/96030476225.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/71649819035.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6113/2968/files/narefok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0414/7350/files/vavebugobezejorudew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3410/6277/files/bourbaki_elements_of_the_history_of_mathematics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8342/3128/files/61624582525.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/wipanudosa.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 6

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_off000063ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63EF 5400 bytes
SHA-256: 7999b7b3f4657c302394736e9dd03d6dd1f5eeb3ce56b287e74c502437fd8b67
font_01_sfnt_off0000763c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x763C 10588 bytes
SHA-256: c66f518f8b395e19c976e29ff260b0a02177d4795319bd44257faf8be566f0f9

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