Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8dbdcc611276d63…

MALICIOUS

PDF

46.5 KB Created: 2020-08-14 13:32:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a78bd26ec14238d592a4befc7bcc0fb6 SHA-1: ff99e735b2511b87a5df47f07dd97126c46ae25f SHA-256: f8dbdcc611276d6336e3798c00eff60fd4fed8c6ecd36e4d6abffdd557a53c5e
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating it's a malicious redirector and a link farm. The primary malicious URL identified is ttraff.ru, which redirects to a page related to a vocabulary worksheet. While many other links point to benign Shopify domains, the presence of the malicious redirector and the sheer volume of links suggest an attempt to manipulate SEO or distribute malicious content through a link farm. No scripts were extracted, and the document body is largely unreadable binary data, limiting further analysis of intent beyond the link farm.

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=chapter+8+sensation+and+perception+vocabulary+worksheet In PDF document text
    • http://files.amygregorio.com/uploads/1/3/0/7/130775027/99f46ea89.pdfIn PDF document text
    • http://kovakine.salmoncreekcotons.com/uploads/1/3/0/7/130776208/wekat.pdfIn PDF document text
    • http://fumosuw.dundasmassage.com/uploads/1/3/1/4/131483281/fubewim.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/1/0438/3988/1373/files/25745170083.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/91812603833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9850/5377/files/ashrae_170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3415/4907/files/28692304627.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0333/0208/files/koduwabevalenorovupev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7382/1082/files/11428039203.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/23380826728.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1474/8322/files/discord_link_text.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7861/5189/files/63571020857.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/webenam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6693/1862/files/45069365669.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/nilikefenaserodoritikuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vidabuvuwegorowomilamum.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_off000073b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73B8 5716 bytes
SHA-256: 7dfbad7cd6036ae7d12f3ecaec987bfa6fa0b539eb94950179de7c446f46e215
font_01_sfnt_off00008738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8738 11152 bytes
SHA-256: 66105fd63bfdcce9c337179bd6aca6287eb19971826964615f45c8dcfa6cfaed

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