Malicious PDF — malware analysis report

Static analysis result for SHA-256 05de3bf536a7c3b5…

MALICIOUS

PDF

43.9 KB Created: 2020-08-05 14:55:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f312f4a185dffbd5e3b9c09331920992 SHA-1: fc43d4e8852d91298c7bf79ca2ba60d5e4c6e5f1 SHA-256: 05de3bf536a7c3b57171fb6a9157eb516a44d6cd6a00358113a784b16ffdbfa8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which point to a redirector service (ttraff.ru) known for malicious activity. The document body, though heavily obfuscated, contains a URL that matches the redirector, suggesting a phishing or scam attempt disguised as a document download. The ML classifier also strongly indicated maliciousness.

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=citation+machine+pdf+apa In PDF document text
    • http://files.jbschafferartist.com/uploads/1/3/0/9/130969390/5587837.pdfIn PDF document text
    • http://files.miamiepoxy.com/uploads/1/3/1/4/131408170/xapuwaj.pdfIn PDF document text
    • http://files.clarityautoglass.com/uploads/1/3/1/4/131453894/152156.pdfIn PDF document text
    • http://files.hutchingsfraktur.com/uploads/1/3/1/3/131382595/2731127.pdfIn PDF document text
    • http://files.ledandminis.com/uploads/1/3/1/4/131407944/fuxemufulawegiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5512/8480/files/70643799858.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8770/7804/files/bitsat_previous_year_question_papers_with_solutions_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2770/1665/files/27221275022.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4098/7544/files/45827385679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6300/0734/files/mulasubakoluxitabunudepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/womosoravitixugefiwil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5713/5257/files/soxotuduj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8558/4801/files/67536499155.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xixuvedivikeror.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/4122/9733/files/la_caida_de_tenochtitlan_unam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6764/5857/files/26277122080.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0455/7472/files/senuxofak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4392/8726/files/19990971476.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6239 4900 bytes
SHA-256: 926bfa7a313985d99df35f1ce5cfef91682a8b63431e9f5b5e007767e641e260
font_01_sfnt_off000072bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72BD 10008 bytes
SHA-256: 32f08dde20fe163d95d5df2f5b5968ad8b961978ff9873ca9b78ab5604dfc009
font_02_sfnt_off000094ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94AB 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3