Malicious PDF — malware analysis report

Static analysis result for SHA-256 c88265c6cb9d2408…

MALICIOUS

PDF

97.2 KB Created: 2020-08-08 13:57:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4c546fd2ba8fef02522a40600bdd9893 SHA-1: 2bd8faef0b23c78acfee0885ce1ae55371f4489b SHA-256: c88265c6cb9d240824312503130bdcbc043efd9cb3eecc72a0ed2b56551502ff
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=breathing+system+of+human+pdf'. The document body, though heavily obfuscated, contains text related to the human breathing system and the wkhtmltopdf application, suggesting a lure to disguise the malicious intent. The presence of a link farm further supports a phishing or malicious redirection attempt.

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=breathing+system+of+human+pdf In PDF document text
    • http://files.rrboxerrescue.org/uploads/1/3/1/4/131408854/jajoliliminora_luwajo.pdfIn PDF document text
    • http://files.connectabletherapies.com/uploads/1/3/1/4/131454696/rigeb-mobulobug.pdfIn PDF document text
    • http://files.northwesternchristianwritersconference.com/uploads/1/3/0/9/130969535/xulimojuxopuge_wafutuwegoju.pdfIn PDF document text
    • http://files.freakzhub.com/uploads/1/3/1/0/131069819/fadaloso-xomezavifedoxa-dolipenarivakof.pdfIn PDF document text
    • http://files.eleksa-sa.com/uploads/1/3/0/7/130738928/289615ba34e4e9.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/1/0433/0507/4838/files/fusokegazuzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7410/1149/files/6533745843.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6857/1299/files/grade_5_math_practice_workbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/92445147680.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5685/5190/files/kajurezafaxuxibekukopuxoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/35637151539.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5736/4638/files/64383940607.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/compiling_using_libnx.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7868051279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6436/0100/files/rubadabupunat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3755/6889/files/97855613503.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 7

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_off00014080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14080 5576 bytes
SHA-256: 50630c9a79beba315e6d33806e344c1ca7877cba96cd4833b6d9198bc9970a97
font_01_sfnt_off00015358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15358 10456 bytes
SHA-256: 562f5d9892535fee3f92a0671c088ea5ab9868de5b42bf246034892ba90709c3

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