Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7bab8dcdfc3ec0c…

MALICIOUS

PDF

41.6 KB Created: 2020-08-08 18:28:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 14b7b12b08c08a84c3b6237acc5a294e SHA-1: b04c6bdbd5f260ebd35662aa55cba3586196f3e6 SHA-256: a7bab8dcdfc3ec0cc35132b01af691b127ca2e96e9aff58603bf5ab249d9cda1
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by a machine learning classifier and contains numerous embedded links. One of these links, https://ttraff.cc/pify?keyword=adding+and+subtracting+negative+numbers+worksheet+with+answers+pdf, points to a known malicious redirector. The document appears to be a link farm designed to drive traffic to potentially harmful sites, masquerading as educational material.

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=adding+and+subtracting+negative+numbers+worksheet+with+answers+pdf In PDF document text
    • http://files.okcsweets.com/uploads/1/3/0/7/130775232/tuwuxupijijojasuxo.pdfIn PDF document text
    • http://files.michigansaf.org/uploads/1/3/1/1/131164202/3352147.pdfIn PDF document text
    • http://files.petergibsongrimes.com/uploads/1/3/1/3/131397987/9842447.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/1/0429/5216/3482/files/27935001088.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/9540699642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6528/6566/files/ziwoxawobofetuwig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7346/9597/files/17535408594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/0570/9219/files/air_force_y_group_previous_year_paper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6509/8908/files/21680031677.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8747/0499/files/bazefiso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/8512/2984/files/angiosperm_anatomy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/5346/9083/files/miller_and_levine_biology_textbook_teacher_s_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5588/1111/files/61552158912.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93616534700.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8118/6972/files/dedufo.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_off00006160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6160 5884 bytes
SHA-256: 78e0d7df4c6404c8d3cc0671e9e512bf40857da9257034266d0bc51e1ada423a
font_01_sfnt_off00007556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7556 10416 bytes
SHA-256: 52e8308b1ff809ae5cbc9cd8c87c5f0a691e733110877017fb3424a0a77f408f

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