Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fdfb31285117a81…

MALICIOUS

PDF

37.6 KB Created: 2020-08-13 19:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1861c7651cbf9cc73fb3d660b71c21c5 SHA-1: e561eaf181289e0f9a320c2d053c6503b96f7c58 SHA-256: 6fdfb31285117a81c238a71db8c46679eaa7f697c43fa57e8cd577edb15f94ea
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded URLs, with a primary redirector pointing to 'ttraff.cc'. This redirector is associated with a link farm and is designed to obscure the true destination of the malicious content, likely a phishing lure for sheet music. The ML classifier strongly indicates maliciousness, and the heuristics confirm the use of redirectors and link farms for deceptive purposes.

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/wb?keyword=keane%20somewhere%20only%20we%20know%20sheet%20music%20pdf In PDF document text
    • http://files.topwebtravel.com/uploads/1/3/2/7/132741486/3687454.pdfIn PDF document text
    • http://voritanu.larnemusicfestival.com/uploads/1/3/0/7/130775934/kajiviv.pdfIn PDF document text
    • http://files.tucsontattooexpo.com/uploads/1/3/1/0/131071151/bekobipal_nakokataw_rejezekiwum_kujim.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/1/0435/4726/3128/files/91557067351.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7731/2411/files/dugitofizugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1044/6744/files/path_of_the_bodhisattva_warrior.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5802/6904/files/kifekeman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1214/5823/files/how_to_ace_the_brainteaser_interview.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8374/2884/files/sutomovedotupesabizar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0363/9970/files/bsc_2nd_year_chemistry_syllabus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7015/3113/files/25351802288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3406/7615/files/vukejol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1197/3026/files/vewapurusulavuv.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_off0000525a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x525A 5620 bytes
SHA-256: 1f624ba16d056f06a68b192f3d36ed455bcfcb8eab841bc0a8cd4f3c86da2250
font_01_sfnt_off00006564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6564 10584 bytes
SHA-256: 151f609411c212930b5db22d37b04760459846223f413c8a81ed2fb3d83df67a

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