Malicious PDF — malware analysis report

Static analysis result for SHA-256 8471d2a6d49a1f2f…

MALICIOUS

PDF

41.1 KB Created: 2020-08-25 11:07:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2978dc86d24121617758e889442c5de5 SHA-1: a8616dbf9f3a884dfb6b9cf3ff91efa6788d9e0e SHA-256: 8471d2a6d49a1f2fd5e5a899358ae454cfa16ab530159ddcd74666a0d0f8b375
94 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a malicious redirector link to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves luring the user to a malicious site via a deceptive link within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.com/pify?keyword=puma+platform+sneakers+black+suede
    • http://files.scifeye.org/uploads/1/3/2/6/132695438/pavizaned.pdf
    • http://files.sushitangofremont.com/uploads/1/3/1/8/131857540/350734.pdf
    • https://cdn.shopify.com/s/files/1/0432/0677/0843/files/about_computer_science.pdf
    • https://cdn.shopify.com/s/files/1/0429/6438/5951/files/57617387946.pdf
    • https://cdn.shopify.com/s/files/1/0429/0212/6751/files/10332371760.pdf
    • https://cdn.shopify.com/s/files/1/0436/6041/1033/files/immigrant_stories_fact_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0466/4144/7077/files/veriwinotilutozuzapud.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/intertherm_electric_furnaces.pdf
    • https://cdn.shopify.com/s/files/1/0437/0658/1147/files/60593493093.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054a2.bin
bb73779caf2f29983426ae692eb31a1c68b10de3afc2f85d64c5928fef97d234		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54A2 5340 bytes
font_01_sfnt_off000066ad.bin
39c065b933c5441783eb5e2556848daebaf0f630d2740a94cfec61d57a8d172f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66AD 10336 bytes
font_02_sfnt_off000089fd.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89FD 4324 bytes

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