Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee5a83bb377f1230…

MALICIOUS

PDF

42.1 KB Created: 2020-08-05 01:47:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 42d853cf8afc7c783a6047bbc5e984fb SHA-1: 6a653e73c5d0fa793905657cd62910bde36abf4d SHA-256: ee5a83bb377f12304dff781317c789c50a3c995b413923c86347c9b8cea28134
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=biostar+handbook+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, many hosted on Shopify. The primary malicious link likely leads to further malicious content or phishing attempts.

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.cc/pify?keyword=biostar+handbook+pdf In PDF document text
    • http://files.middsga.com/uploads/1/3/1/3/131380480/gutaxavud.pdfIn PDF document text
    • http://files.alliancerestorationkc.com/uploads/1/3/1/3/131379111/zipimerebekogit_nezobatojemite_motenot_javejapiv.pdfIn PDF document text
    • http://files.idahotaxidermistsassociation.org/uploads/1/3/1/3/131380848/6286745.pdfIn PDF document text
    • http://files.rdiallog.com/uploads/1/3/1/1/131164520/fazejazobikip.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/1/0427/5650/5756/files/bufeteloxiso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5747/8823/files/4951693390.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1119/4525/files/82329718209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7988/3170/files/divifolesopag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2764/5084/files/85188821996.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0392/8991/files/genetics_essentials_2nd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2273/5767/files/34363404447.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/15138334831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6081/2190/files/56622344297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6694/9786/files/sijukelawor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/wupijifekejekifutira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9436/7644/files/logiciel_de_traduction_de_fichier_anglais_francais_gratuit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/jexib.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_off00006562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6562 5348 bytes
SHA-256: a45bd601dfad64bade5f41c802b05d27890614ee9f68c928857ff2cfad6cf943
font_01_sfnt_off00007784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7784 10512 bytes
SHA-256: cfc4b67937cfc4fe94e413444cda61050f90a01b63d40bd7fcd6234b062dde89

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