Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dee4b9e7bd025b0…

MALICIOUS

PDF

46.9 KB Created: 2020-08-19 19:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1c5cc23efdd6de1c93e75fc2d05d2a1 SHA-1: 259d02c711744efce8d1b7971848e35e560ff2b6 SHA-256: 5dee4b9e7bd025b0235bac3289ac563be675cf7346a60c0be7d0bb57c1ece9ae
154 Risk Score

Malware Insights

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

The PDF contains a critical 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 lure the user to a malicious site. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm or redirection strategy. While the document body is heavily obfuscated, the embedded URL is clearly visible and 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=ddd+c+template
    • http://files.joyinteriordesigns.com/uploads/1/3/0/7/130775446/8228983.pdf
    • http://vilaja.aviationaces.net/uploads/1/3/1/8/131856373/cd4278caea50c5b.pdf
    • http://jerutate.wolfridgearchery.org/uploads/1/3/0/7/130740025/tamazinapizorekovomi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9851/4343/files/3627210069.pdf
    • https://cdn.shopify.com/s/files/1/0437/6251/6122/files/beanie_baby_price_guide_book_2015.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/navy_seal_training_program.pdf
    • https://cdn.shopify.com/s/files/1/0433/3735/1323/files/switching_and_finite_automata_theory_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/60431162067.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/79176964079.pdf
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/vowaponirerevinowujafedo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5544/7201/files/melex_golf_cart_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/1203/6520/files/tilorejuxogejan.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5142/files/33155126840.pdf
    • https://cdn.shopify.com/s/files/1/0434/2192/5525/files/jolly_phonics_a_z.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_off00006fd8.bin
b57cd1ca151c3d471de445500e91c5177bb790b213c985631b06616864ee504e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD8 4944 bytes
font_01_sfnt_off00008090.bin
96fd4a85afd754997fb48610548119787c3e8ec1dbd15f92efdd969764a056d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8090 1952 bytes
font_02_sfnt_off000089f1.bin
4cbafd01927cbb50c6f87047489dc7e8382f95e58efbd27c3ca430ebebd43c04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89F1 10284 bytes

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