Malicious PDF — malware analysis report

Static analysis result for SHA-256 958c8046152c005e…

MALICIOUS

PDF

47.0 KB Created: 2020-08-09 14:30:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee80ec8b141a8985e63892e93abc4134 SHA-1: 24f4ddc90885058b40cf42ba850df940c4e07229 SHA-256: 958c8046152c005e9420452722b21140b44b322de6927eac231ffd43adaf7051
152 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.com'. Additionally, a PDF SEO link farm heuristic indicates the presence of numerous external links, with one pointing to a Shopify domain. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the primary intent is to lure the user to this external site.

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.com/pify?keyword=t%25C3%25A9l%25C3%25A9charger+alphabet+phon%25C3%25A9tique+international+pdf
    • http://files.wblhoa.org/uploads/1/3/0/9/130969470/saxiwu-pezikixipupaku.pdf
    • http://jevapud.bluesandcollection.com/uploads/1/3/2/8/132815028/e0e1fbaaa7159e.pdf
    • http://files.everythingconnects.org/uploads/1/3/0/7/130776393/4707946.pdf
    • https://cdn.shopify.com/s/files/1/0432/0365/7887/files/muvubojakol.pdf
    • https://cdn.shopify.com/s/files/1/0429/1998/5319/files/fuxosusegovavi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2680/files/vifixebesefupuguwemogu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94192334972.pdf
    • https://cdn.shopify.com/s/files/1/0430/0177/4233/files/welibusonitu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1251/4201/files/7751165744.pdf
    • https://cdn.shopify.com/s/files/1/0434/3404/9703/files/setedovi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/manadowaminidojuxita.pdf
    • https://cdn.shopify.com/s/files/1/0431/9507/2674/files/achieve_ielts_2_teacher_s_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/1237/4174/files/pdf_to_eps_linux.pdf
    • https://cdn.shopify.com/s/files/1/0437/2443/9704/files/57525090471.pdf
    • https://cdn.shopify.com/s/files/1/0439/1777/0904/files/ritipifutodekanobabotadew.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/telecharger_des_journaux_algerien_en.pdf
    • https://cdn.shopify.com/s/files/1/0438/6163/9318/files/10640158758.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_off00006a39.bin
c3a8f4415965c0dd0e70ff472d1fbbf078852ac72372aeb5f91a8751019bb18e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A39 5596 bytes
font_01_sfnt_off00007ce0.bin
c3c9d452a917cc81233bb1a4e9a507f997b206836bfbd1daeb9e29e10b240bff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE0 15480 bytes

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