Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f49e2130e6a9ac8…

MALICIOUS

PDF

44.8 KB Created: 2020-08-23 22:53:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f997037bed635a6c1cc41dd00f97e5a SHA-1: 1fe451cbb9b0b2095f5f2ff62274ef4914021755 SHA-256: 5f49e2130e6a9ac89435dfc520855a2abe836c61926f47cf3b6940fba8b1042c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body also contains this URL, suggesting an attempt to trick users into downloading further content. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm or SEO spam tactic. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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=baksana+talihe+m%25C3%25BCjde+aklano%25C4%259Flu+pdf+indir
    • http://files.plateauvalleyanimalhospital.com/uploads/1/3/2/6/132681985/4898453.pdf
    • http://wokimone.athenaart.org/uploads/1/3/2/8/132816202/pipuditumu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/removasofodebesasexumul.pdf
    • https://cdn.shopify.com/s/files/1/0429/7100/5082/files/family_guy_theme_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/7832/8221/files/58213377664.pdf
    • https://cdn.shopify.com/s/files/1/0435/5561/8977/files/34463979766.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/22301527725.pdf
    • https://cdn.shopify.com/s/files/1/0431/3035/5866/files/6511269765.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4669/files/cavendish_university_courses_and_fees.pdf
    • https://cdn.shopify.com/s/files/1/0433/1202/1657/files/vebexireraf.pdf
    • https://cdn.shopify.com/s/files/1/0439/1682/0648/files/27935011309.pdf
    • https://cdn.shopify.com/s/files/1/0433/9354/8444/files/sozubiravorawolul.pdf
    • https://cdn.shopify.com/s/files/1/0437/4659/0872/files/four_rightly_guided_caliphs.pdf
    • https://cdn.shopify.com/s/files/1/0433/0710/6462/files/97019588223.pdf
    • https://cdn.shopify.com/s/files/1/0435/4169/2567/files/sukonubajilewulileroz.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e5e.bin
bfd92d26ff82a24fcf6b1c33d644c5006f7dc60fa3d03aa9c8ad48d9a071642b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5E 5704 bytes
font_01_sfnt_off0000716c.bin
61d78d6d06c53e5cd61d5d1606376afcb1d751adfd9fe924170bba9bde4f10c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x716C 11764 bytes
font_02_sfnt_off0000960b.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x960B 4324 bytes

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