Malicious PDF — malware analysis report

Static analysis result for SHA-256 480bae8d7f0412be…

MALICIOUS

PDF

42.0 KB Created: 2020-08-07 17:09:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: af22ad051a780c01c2e6cde6284be32a SHA-1: ab72d429b493d497565a1900b0e8613397f82420 SHA-256: 480bae8d7f0412bea410a2b355317fbc45830681fbe63d770bd038898bfc80d7
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary malicious redirector URL embedded in the document body. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the link https://ttraff.ru/pify?keyword=xiaomi+airdots+manual+pdf leads to known malicious infrastructure. The document body, though heavily obfuscated, contains references to 'Xiaomi airdots manual pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious links. The ML classifier also strongly flagged this PDF as malicious.

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=xiaomi+airdots+manual+pdf In PDF document text
    • http://files.grassingtondevonshireinstitute.org/uploads/1/3/2/6/132681851/0982864.pdfIn PDF document text
    • http://files.kodawarisake-edu.com/uploads/1/3/1/3/131379382/rolaluwivezif-todolox.pdfIn PDF document text
    • http://files.dairyflatponyclub.org/uploads/1/3/2/7/132740362/3692449.pdfIn PDF document text
    • http://files.swellamy.com/uploads/1/3/1/3/131379183/276072.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/1/0430/8385/8073/files/balzac_and_the_little_chinese_seamstress_full_text.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8006/2878/files/42770733120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/96145260952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2175/3758/files/97908955963.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8747/0494/files/9615638702.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xoxolesusoziviro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7002/8966/files/foundations_of_astrophysics_ryden_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7227/5103/files/43985411588.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3862/9270/files/vibofitupotoralezog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0934/2621/files/dewoluwewugupebepawefad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6974/1983/files/solubilities_of_inorganic_and_organic_compounds_pdf.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_off000066ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66AE 5164 bytes
SHA-256: a75e44c89249bf482f47244e3fd52a87ac769839481b191acbd5dd85217f7e71
font_01_sfnt_off00007825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7825 10488 bytes
SHA-256: 52abeeb479a1e02851a560f76d3a545edaa8aada4fadefc879c58f761fb0c464

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