Malicious PDF — malware analysis report

Static analysis result for SHA-256 7545c6b3864d6b98…

MALICIOUS

PDF

32.6 KB Created: 2020-08-10 07:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8f82968a5dac74597cbdb0239bdea3d1 SHA-1: 72cb709b061a367f09b4c7185f5d6ad2c1994985 SHA-256: 7545c6b3864d6b98841f766de037c5ad89216a77bf5ffeff5fe5e394fe0bd5a9
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains text suggesting a lure for 'Bsc calculus notes chapter 1 pdf'. The presence of multiple embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to a phishing or malware distribution site.

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.ru/pify?keyword=bsc+calculus+notes+chapter+1+pdf In PDF document text
    • http://files.teamblendedbeauties.com/uploads/1/3/1/0/131070590/vojukup.pdfIn PDF document text
    • http://files.kelvingibbons.com/uploads/1/3/1/6/131607712/supagadanipaxinixej.pdfIn PDF document text
    • http://files.paintedturtle.co/uploads/1/3/1/3/131384115/fb6e72c34255.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/1/0431/8865/0142/files/ammonium_sulfate_msds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7511/6964/files/wufozuwigadanexalerazufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1796/9570/files/gimajizorewukoludafezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4371/5222/files/koxilidalugasumewobeka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4309/3660/files/beef_a_roo_nutrition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8704/4510/files/79098835214.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0692/6754/files/riviragoxor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4418/3970/files/92745938618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/gakatuxakurojager.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 7

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_off000043c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43C4 5344 bytes
SHA-256: d410a53123c01e4c6daf14b9d5bbf3c45de93a926c4e5fbbbc14906a7e4b917b
font_01_sfnt_off000055f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55F1 9276 bytes
SHA-256: c7442aa9fc3be942284e67d1f9e4b9d60b7bedc84d058217bcc490ceacb386ec

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