Malicious PDF — malware analysis report

Static analysis result for SHA-256 85f2b4f4e250507c…

MALICIOUS

PDF

42.1 KB Created: 2020-08-09 08:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f12249b9a474f59f06b46e9ead7087c4 SHA-1: c45b3b5361f8b7b42ee0c3451264d076c8831544 SHA-256: 85f2b4f4e250507c7bd6539f6696123d3fcf251dae902302f90bf90e64b3ade3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links designed to appear as legitimate book downloads, but they redirect to malicious infrastructure. The primary redirector URL is https://ttraff.cc/pify?keyword=mathematics+syllabus+d+book+pdf, which is flagged as malicious. The document body and heuristics indicate a link farm strategy to lure users into clicking these deceptive links, likely for phishing or malware distribution.

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=mathematics+syllabus+d+book+pdf In PDF document text
    • http://files.jerseydentalstudio.com/uploads/1/3/0/7/130775978/tipuwizoli.pdfIn PDF document text
    • http://files.mybridgefilms.com/uploads/1/3/0/8/130874110/kogaraged.pdfIn PDF document text
    • http://files.milenaciciotti.com/uploads/1/3/1/3/131380651/wonuw_sapatafoxef_nonij.pdfIn PDF document text
    • http://jetomo.burrenarchery.com/uploads/1/3/1/8/131857334/4985756.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/1/0427/6027/4087/files/bumaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2214/0063/files/salotumiwilevokiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9434/3834/files/autoimmunity_mechanism.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/tagalopo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5248/2208/files/87696930935.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7398/4919/files/pofukipikopuxavag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nipexaledova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3504/9640/files/arduino_tutorial_francais.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5945/3860/files/11707883887.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1292/2264/files/namozoxexusine.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_off00006598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6598 5612 bytes
SHA-256: 1623d642825be7f6df862165efac22705866a64bb9d53b0f48c343844d77534b
font_01_sfnt_off0000789e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x789E 10124 bytes
SHA-256: ec56f91c327ea77c2dee44e4caa6f4d0bc45ecdd881bdcae8218132067d74d37

Open this report in the interactive analyzer, or submit your own file for analysis.