Malicious PDF — malware analysis report

Static analysis result for SHA-256 f998b444046d12f4…

MALICIOUS

PDF

52.1 KB Created: 2020-08-31 07:37:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f320920c632ffa189306de358ff8d6d7 SHA-1: dad1b15b2cc8a6cc9c1ac55ee64ac54a2b88c535 SHA-256: f998b444046d12f40b1193d32524e51edb1c05197e1793d8ef571c51289e681a
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains numerous embedded links. One critical heuristic indicates a malicious redirector link to 'ttraff.cc', suggesting a phishing or malware distribution attempt. Another critical heuristic identified a PDF link farm, with many links pointing to Shopify domains, likely for SEO manipulation or to host further malicious content. The document body itself contains metadata and a URL, reinforcing the link-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/wix?keyword=ahlak+metafizi%25C4%259Finin+temellendirilmesi
    • https://cdn.shopify.com/s/files/1/0460/8691/4212/files/dead_rising_4_mods.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/41729532820.pdf
    • https://cdn.shopify.com/s/files/1/0437/3574/4673/files/jupazirejikiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9385/files/riwekosazorunoja.pdf
    • https://static.usrfiles.com/ugd/d99ef3_7e3e9fb76b194e98af47f8acf91c1dc0.pdf
    • https://static.usrfiles.com/ugd/f0e51d_2c7b0e817f2c4154bd2bd254db66b3a1.pdf
    • https://static.usrfiles.com/ugd/a48928_ab608418277e456392584b0148af4589.pdf
    • https://static.usrfiles.com/ugd/ca9b0a_86a73a655e504edcae02d50f2b06d2fc.pdf
    • https://cdn.shopify.com/s/files/1/0431/3012/6490/files/hipaa_hb300_basic_training_quiz_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/7206/1591/files/nojifovaguvepu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008a4b.bin
6a8e25267a71976234d764517f825510c597ec5193138d663277b1e4128c2a1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A4B 5480 bytes
font_01_sfnt_off00009ccd.bin
c2e87d52f501ce99b15023fb2b382080d33720d00ce4b8a8b59142cfe02235e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CCD 11868 bytes

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