Malicious PDF — malware analysis report

Static analysis result for SHA-256 5413af88a210153c…

MALICIOUS

PDF

52.6 KB Created: 2020-08-05 04:04:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c2efdbc0dbf8255a89987eeef0e42c37 SHA-1: d03d06f1a55c2caf00c6d1ccf8d2e266073b5451 SHA-256: 5413af88a210153c780cc3bafa9cab1553bc15f8037ad1c6d0f681ab01bb13b8
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=applied+physics+pdf+for+diploma'. The document body, though heavily obfuscated, also contains this URL and other links pointing to Shopify domains, suggesting a link farm or redirection scheme. The ML classifier strongly supports the malicious nature of this PDF.

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=applied+physics+pdf+for+diploma In PDF document text
    • http://files.nessflett.com/uploads/1/3/1/0/131070911/xuwakuwo-fajibuleti-zititefofabo.pdfIn PDF document text
    • http://files.learnallthethings.org/uploads/1/3/1/8/131856195/lagadapi_lelasanagerifu.pdfIn PDF document text
    • http://kufim.mothernoble.com/uploads/1/3/0/7/130776485/xaxagorum.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/1/0431/5634/0890/files/xibukemozijabosimajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6635/9962/files/4990235553.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3698/2952/files/tederefofaxamubovazuxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8386/6007/files/zitepibi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89709194360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8271/1201/files/15886943838.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/40615173035.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/biology_of_belief_bruce_lipton_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6095/2229/files/6106806597.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4609/2445/files/all_weather_strategy_portfolio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3192/8740/files/91929551773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/94188928869.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC7 1684 bytes
SHA-256: a8640cb23b15ac802f89dd0648c07b7ad030d8b62c5f78624c3814794ace58c4
font_01_sfnt_off0000862b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x862B 5484 bytes
SHA-256: ce32352c13e6133bec15182833eae78f55eacb0e7760c8e2232009be8fdead21
font_02_sfnt_off000098b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98B2 13928 bytes
SHA-256: 3d4532fc4fb3c12b6758fdeb23d244bdde32b7f8f587adbf89d7853e80bcf28d

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