Malicious PDF — malware analysis report

Static analysis result for SHA-256 643c397d13e12cff…

MALICIOUS

PDF

45.5 KB Created: 2020-08-15 05:31:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2fdbf86dc19c0da20ad628f09bd33241 SHA-1: 6fedf2b12e4417932ac5d99ae2ac1b55bef0b928 SHA-256: 643c397d13e12cff828788e410b04cb1d18ca35ef3bf582f41cb9c6b0cd0fc80
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to Shopify, but one critical link redirects to a known malicious infrastructure at ttraff.com. This suggests a phishing or scam attempt using a link farm to disguise the malicious destination. The ML classifier strongly indicates maliciousness, and the presence of a malicious redirector URL is a high-priority indicator.

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.com/wb?keyword=monumento%20continuo%20superstudio%20pdf In PDF document text
    • http://simig.madrassi.org/uploads/1/3/1/4/131483254/2924822.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/1/0436/5477/4949/files/free_bootstrap_templates_for_corporate_website.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0544/3233/files/ergonomics_book_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9689/9733/files/wumukob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7663/0181/files/47502068517.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/pasijasewevupigaxuwezulo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7795/8816/files/titadeduxonoxeja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5996/1239/files/62698745379.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1280/8091/files/ap_transco_ae_notification_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5241/7692/files/cateye_volt_700_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6558/0437/files/joint_probability_distribution_function.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_off00007216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7216 5064 bytes
SHA-256: 4d51b9cbff063cc45cfbfca92419aaf5cea2b1e42bcdae753027a593748b335f
font_01_sfnt_off00008343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8343 11356 bytes
SHA-256: 79b476f65d78d4fb342da5dc1839ca3d0e5252eaa5dab0afcf64c18a75789370

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