Malicious PDF — malware analysis report

Static analysis result for SHA-256 de5c9c407ab2ceeb…

MALICIOUS

PDF

40.7 KB Created: 2020-08-21 04:06:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cc96c9be6414f5cb951d2442161aa488 SHA-1: 6df18bdc6ee140fe2818e33f62e5b7300e74ac54 SHA-256: de5c9c407ab2ceeb689c6cd52c58f56aaa5b5dedc148c6e2947ce6a0f013f487
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a malicious redirector at ttraff.ru. This redirector is disguised with a keyword related to 'davids bridal plus size guide', suggesting a lure to trick users into clicking. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful 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.ru/pify?keyword=davids+bridal+plus+size+guide In PDF document text
    • http://files.judytwedt.com/uploads/1/3/2/3/132303023/27ef5c7e05.pdfIn PDF document text
    • http://files.catchingupwithcasey.com/uploads/1/3/1/6/131607019/2b1abdc148c6.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/1/0432/5376/0162/files/gomemudoxumidonasizofopu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/vuxopogovugafirezaruf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4419/9829/files/musixusejunujefilo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/51462957987.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/21366200429.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3092/0871/files/6605713236.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/2175/7590/files/73199005606.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4179/1895/files/vexerovetosurirutozeloju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/teviligesumepefuvo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4747/7667/files/2745852106.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3973/6487/files/banquete_de_platon_gredos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3850/6146/files/child_care_provider_resume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0976/8600/files/jugefefos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5206/4155/files/gunofewofeparomo.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_off00006031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6031 5376 bytes
SHA-256: de9020446b73c178bffba67454accc0e475a63a67b53b8b675e88d5ceef7521e
font_01_sfnt_off0000728e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x728E 10352 bytes
SHA-256: 1c75172c4dc15ae0121425bc80a9c153e2158d9082a48b16567e5bf720078902

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