Malicious PDF — malware analysis report

Static analysis result for SHA-256 39d402fed7b193dc…

MALICIOUS

PDF

90.4 KB Created: 2020-08-05 17:34:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a5308d7070133544d8f887fe76872447 SHA-1: 4a479765eb9c9430a664776831c2c13dcf964c81 SHA-256: 39d402fed7b193dc4a2cc2ebe87053571a82c5915bbcc6c5929ca395a70fa61e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. This URL is embedded within the document body, suggesting a social engineering attempt to trick the user into downloading a malicious file or visiting a compromised site. The PDF also exhibits characteristics of a link farm, further indicating malicious intent.

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=genetics+from+genes+to+genomes+5th+edition+pdf+download In PDF document text
    • http://files.cometsathleticboosters.com/uploads/1/3/1/3/131384025/193607.pdfIn PDF document text
    • http://files.naiadflowyoga.com/uploads/1/3/0/7/130739174/5434441.pdfIn PDF document text
    • http://files.rina-bansuri.com/uploads/1/3/1/4/131406659/kitufaxaga_sidisetiv_vexikitafot.pdfIn PDF document text
    • http://files.tuscanoaks.org/uploads/1/3/1/3/131398541/sufiwate.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/1/0428/2508/9191/files/9665389815.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6385/2708/files/40704800764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8036/5720/files/2382376850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8333/9678/files/kibuweluzusefakatalirux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6447/5299/files/timex_ironman_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3355/8168/files/jusimovutozimobebupabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2879/0946/files/27403486431.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dobemajafapurotexujebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/82191842179.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4354/3447/files/78426350763.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/putoxapobemiludofisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4079/8885/files/chemistry_notes_for_class_11_chapter_6.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 8

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_off00011881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11881 5816 bytes
SHA-256: 3b8dcb59e12bb80f738cbb32d064f6e24daeedd598a2bb4bc47f944a8161bf49
font_01_sfnt_off00012c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C3E 15024 bytes
SHA-256: 902baeffb6787df6dcd533b8f125ae2333532c2b83f90856e46b317798b71c7f

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