Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8730ecad03709d8…

MALICIOUS

PDF

38.9 KB Created: 2020-07-30 07:19:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c44f65fca7a6401540c2d76570e2dfaa SHA-1: 5eb7be5755a7a7892a330130225f65471de736bb SHA-256: a8730ecad03709d809c82ed5dc0e43968f60fbc98ac05ea13cce328b2093f357
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a link farm designed to appear as search results for technical documents, specifically 'Autocad electrical drawings for practice pdf'. This link redirects to a malicious URL (ttraff.cc), indicating a phishing or malware distribution attempt. The ML classifier strongly supports the malicious verdict, and the PDF structure is consistent with SEO-based lures.

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=autocad+electrical+drawings+for+practice+pdf In PDF document text
    • http://files.kelvynkoning.com/uploads/1/3/1/6/131606003/kuzaridawuzenefaxes.pdfIn PDF document text
    • http://files.franklininternationalbeautystore.com/uploads/1/3/1/3/131380485/vedajojanuroso.pdfIn PDF document text
    • http://files.willcrooke.com/uploads/1/3/1/6/131606201/82db5f9.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/1/0432/3124/8539/files/88090184688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6498/3703/files/gexulurot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/getedopoxow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4339/6506/files/49394267946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0160/9366/files/15103517535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9570/4227/files/kezazenaxewofe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7005/3782/files/mozazijelotimupo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27392185694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kefemomorevogik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6957/1233/files/rozarofizujebof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/92530996665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/91159557079.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81603963226.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 8

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_off00005b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B70 5284 bytes
SHA-256: ba89f8b9cd7af325ae9316f541dca2280f678311287875b2ea8e0bb970092f9d
font_01_sfnt_off00006d87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D87 9660 bytes
SHA-256: 7e3e27db2596ac98cdfa90ff8b47da1b5ab5fa5ae263d05da0fd2c8cc78d9031

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