Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a025fa86a25e57c…

MALICIOUS

PDF

33.3 KB Created: 2020-08-18 22:39:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c409ff35c475440e040cea3a0733f9c5 SHA-1: 0220362990176268c675d3c75b5932889daa7bcd SHA-256: 3a025fa86a25e57cf1decd60b300a8496be19a64715044dfe5aed2202b56e078
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as 'Algebra 1 chapter 3 quiz answers'. This link, https://ttraff.cc/pify?keyword=algebra+1+chapter+3+quiz+answers, leads to known malicious infrastructure. The document also hosts a large number of external PDF links, many hosted on Shopify, suggesting a link farm for SEO manipulation or to obscure the final malicious destination. No scripts were extracted, but the primary attack vector is the embedded malicious URL.

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=algebra+1+chapter+3+quiz+answers In PDF document text
    • http://files.lovepositivecounseling.com/uploads/1/3/0/7/130775756/tavivirozizatidi.pdfIn PDF document text
    • http://mizesifa.lifootcarepc.com/uploads/1/3/1/6/131607131/48c52a9b356fd9d.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/1/0434/4204/5090/files/xibakaxefugug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5574/2114/files/kigumarimofikijatexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4233/3084/files/97221000606.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0088/9507/files/vukulosuzepobitet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/jegifajupawotalati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7373/2768/files/xopujosuwumaxirowakab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4402/8059/files/5509970969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2129/5003/files/wijedinunobeza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9593/9488/files/44377754481.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0918/5691/files/65741003910.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_off0000423a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x423A 5808 bytes
SHA-256: 5978a938e223775d6161f1d18302e3261f211c8be5888f4dcd0dae2a1dcc6b97
font_01_sfnt_off00005615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5615 10184 bytes
SHA-256: ee0e26571f4ad07c564a4473762102c1a735a825710513154eefdd9b8604a373

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