Malicious PDF — malware analysis report

Static analysis result for SHA-256 c598b9359c60040b…

MALICIOUS

PDF

41.8 KB Created: 2020-08-23 03:23:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bb55df9b9e3d607e5cd9251196bc55d2 SHA-1: 934b28f79ef44d1f189548b1ab14ba76b8093e45 SHA-256: c598b9359c60040bed587328fb3c549cbae67243f4768eab247b8769e707a215
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.ru/pify?keyword=dell+inspiron+3521+cd+rom+driver', is designed to lure users into downloading potentially harmful content by masquerading as a driver download. The presence of numerous other PDF links, many hosted on cdn.shopify.com, suggests a link farm or SEO poisoning tactic to increase visibility and click-through rates. The ML classifier also strongly flagged this PDF as malicious.

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=dell+inspiron+3521+cd+rom+driver In PDF document text
    • http://wedefuja.tempestuous.ca/uploads/1/3/0/7/130739919/rakeroman-xafegoror-doxupaxad.pdfIn PDF document text
    • http://sixukulut.dzogchencollege.org/uploads/1/3/2/6/132681268/61bc5e7fda90b5.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/1/0429/8270/3257/files/nafiguvegebi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1980/4567/files/osrs_1-_99_construction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5557/1353/files/xumudem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/30896319712.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/75845464444.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5394/0887/files/moxinubufovawugilulivorag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4028/4573/files/aer_lingus_claim_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/0142/9406/files/manual_aumento_de_obligaciones_sat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8392/1563/files/spelling_bee_words_for_grade_11.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2119/7724/files/20252031341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3012/6496/files/94844003636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8914/0643/files/teacher_job_interview_questions_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4628/1120/files/rowdy_baby_tamil_movie_video_song.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
🗂 Part of campaign: embracechurch.co.uk 4 samples

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_off000061f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F8 5540 bytes
SHA-256: 21fa2980ee4d26d76bc8667f122d2d382c32ce97337d68921e7fac4eeac0b977
font_01_sfnt_off000074ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74CA 11116 bytes
SHA-256: 8147b92f027588ee1e9991e923e97b73d35561023ae7b638ed792df9500167d2

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