Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c26bae52b94b649…

MALICIOUS

PDF

34.5 KB Created: 2020-07-31 16:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e839904687c8c3391a79278fb8d952f1 SHA-1: 6fec828146aa8ed756b4eac10ce2147d52d09970 SHA-256: 7c26bae52b94b6493b720e7ca4a46ec7d65fcadf48b5b051f5a0498f6c9f8512
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.cc) which is flagged as malicious. The document body, though heavily obfuscated, contains text related to 'Actuarial mathematics bowers solution manual pdf' and includes the malicious redirector URL, suggesting a phishing or scam lure. The presence of a link farm and redirector indicates an attempt to drive traffic to malicious 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=actuarial+mathematics+bowers+solution+manual+pdf In PDF document text
    • http://files.thecornerstohr.com/uploads/1/3/0/7/130775023/f8e54af591b7ad6.pdfIn PDF document text
    • http://files.sierrastonefabrication.com/uploads/1/3/1/4/131482864/nazunegetu.pdfIn PDF document text
    • http://files.daytoncommunitynews.com/uploads/1/3/0/9/130969573/d594ebc04509349.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/1/0435/1046/4667/files/10963956029.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6926/7354/files/daraf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3312/3221/files/44061767469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/lopisixidominiwapozex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5657/0266/files/xiwen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0580/4698/files/jodofidozoboxirosebipe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1609/3849/files/54254667435.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/46049154387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6213/0848/files/75858566377.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/nateta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0601/7186/files/17474120782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7321/6412/files/vivekam.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_off00004814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4814 5616 bytes
SHA-256: a07e2cb523e1de3ea6bc2320d723944a3eedba3e4c1d7bbcbb23c2a3c24300dc
font_01_sfnt_off00005b11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B11 9820 bytes
SHA-256: c691979cc677f9d34fd99ce47d0759f0c97f0aa227f3a3d7cebc2cd3ed71e982

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