Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef99249b5c6771ef…

MALICIOUS

PDF

40.0 KB Created: 2020-08-14 19:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 43935bb59fc6d578fcb46d76e8c0c6e9 SHA-1: e91b7894884019e993a0e1168cac8206d7fa99b8 SHA-256: ef99249b5c6771ef6d6336fc42f354dbe1f549523dfcf2cff2523768061403bd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a lure related to an 'Addiction severity index self report' and embeds multiple links. One of these links, https://ttraff.cc/pify?keyword=addiction+severity+index+self+report, is identified as a malicious redirector. The document also contains a large number of PDF links, many hosted on shopify.com, suggesting a link farm or SEO poisoning attempt. The overall structure and the presence of a malicious redirector indicate a phishing or scam attempt designed to lead the user to harmful content.

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=addiction+severity+index+self+report In PDF document text
    • http://files.ivepetthatdog.com/uploads/1/3/0/9/130969545/a4a29060e4bd5.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/1/0428/3128/2335/files/family_life_bible_study_for_couples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9139/2664/files/pupoxinojefadikalaxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98973723668.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1877/2903/files/salaselofujolenabapez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/nidoguforunubatisawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2823/3885/files/legejalavasogewagoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9970/8821/files/vupemajapipupoxofagakezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45251784546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2128194791.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9929/0776/files/jugud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1673/2315/files/79225218399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0351/6824/files/bouncing_ball_animations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1720/6949/files/78159062377.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 1

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_off000060ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BA 5160 bytes
SHA-256: bda0cced1ed57ab5302d0289cd7d7047de8d91fab2f4d8b24fb6bc0f012de0ff
font_01_sfnt_off00007262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7262 9664 bytes
SHA-256: 7520f787ffc2fdcd67b6c67f604971bb3fa8ea8341c26617c6b19bc71c53f390

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