Malicious PDF — malware analysis report

Static analysis result for SHA-256 673a14ea51a4a0c0…

MALICIOUS

PDF

52.6 KB Created: 2020-08-25 11:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6bc163faf622ac0d38d660ba6116a5e SHA-1: e51349ad9a3d1cc4ef47d27d9f858c36f592b054 SHA-256: 673a14ea51a4a0c09cd57f8315190294678bcbc3254bc173ca87fe3fbf06df18
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body also contains this URL, disguised as a 'Street Fighter 5 Blanka guide', and numerous other PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier also strongly flagged this PDF as malicious.

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=street+fighter+5+blanka+guide
    • http://files.mybestieswholesale.com/uploads/1/3/2/6/132681579/kovivevosokin-lorop-jitanurebite.pdf
    • http://files.hsc3knives.com/uploads/1/3/0/9/130969243/a00465f049b.pdf
    • http://rozofu.katekinsey.com/uploads/1/3/1/6/131606289/1cc7c9daa0.pdf
    • http://files.bildwerkfrauenau.de/uploads/1/3/1/6/131637546/c130411c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/3365/7498/files/10295804625.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8913/files/muduvejidem.pdf
    • https://cdn.shopify.com/s/files/1/0464/7691/8934/files/drugs_acting_on_autonomic_nervous_system.pdf
    • https://cdn.shopify.com/s/files/1/0441/0625/2440/files/wuwaxukeruxijuxejaxila.pdf
    • https://cdn.shopify.com/s/files/1/0429/6998/9279/files/polimugovajakavaxezo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0071/files/basic_electronics_full_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/cyberpunk_2020_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/10566334265.pdf
    • https://cdn.shopify.com/s/files/1/0440/1656/6422/files/rabavuveretexes.pdf
    • https://cdn.shopify.com/s/files/1/0440/6450/6006/files/participatory_action_research.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_off000075bf.bin
0c2e50019242c9d2730a00fb9c64747452d488be999c44bf7cdc8672885e8111		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75BF 5196 bytes
font_01_sfnt_off0000875e.bin
63bcd060fff59cf75420f9f7b1bb83b077a41a1a78c98ef161d7c863b4cd6f72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x875E 15608 bytes
font_02_sfnt_off0000b7d0.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7D0 4324 bytes

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