Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c1971f9079d26af…

MALICIOUS

PDF

44.2 KB Created: 2020-08-21 12:49:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1977f3ac98ff62176af60cb257918607 SHA-1: ef04ff7419e613aa17ae98e6abb45d38bfdabb82 SHA-256: 4c1971f9079d26af01c795adaa1a8cc7da36e0ef7d3f4638e71f2e0788dabc22
194 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains numerous embedded links. A critical heuristic identified these links pointing to a known malicious redirector service, 'ttraff.cc', which likely obscures the ultimate destination of the attack. The document body contains garbled text but also includes the redirector URL and several Shopify-hosted PDF links, suggesting a link farm or redirection scheme designed to lead users 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=chrome+on+mac+air In PDF document text
    • http://files.marshallforhouse.org/uploads/1/3/0/7/130775002/6336302.pdfIn PDF document text
    • http://files.bearviewllc.com/uploads/1/3/1/4/131407138/2eba9828d7b2ba.pdfIn PDF document text
    • http://files.fatzdomino.com/uploads/1/3/0/8/130814284/5109080.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/1/0430/4932/0610/files/56796206003.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7018/5879/files/piwiweme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4211/8555/files/carbon_footprint_survey.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuwotowomezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7232/3737/files/13108389694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/base_html_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3827/6760/files/editor_file_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/1410/5760/files/70484003700.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/vojekomelu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/zemumabibafirejefuwezu.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 2

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_off00006fc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC3 4736 bytes
SHA-256: 67bc3caad27ddbba6f394bb4dfde5ef2ec69c94b5a7ea9c331645a6ad153554d
font_01_sfnt_off00007faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FAA 10696 bytes
SHA-256: f3e8b00a99e15df8c8679e342cf7d6cfabf174caa8365f8d25e5b042d0b2288b

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