Malicious PDF — malware analysis report

Static analysis result for SHA-256 29f5c9b3de0ecd5b…

MALICIOUS

PDF

49.4 KB Created: 2020-08-03 08:01:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef0c31b2940ba1680a0ef950da9a37c4 SHA-1: af4dd2cfe02b37169945bb60bc7d7436ff3adf78 SHA-256: 29f5c9b3de0ecd5b754d0383b76da75833355f4bef1c34569d8718dbac527e8d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=way+of+the+cobalt+soul+pdf'. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a link farm or redirection scheme. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to redirect users to harmful content.

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.ru/pify?keyword=way+of+the+cobalt+soul+pdf
    • http://files.nomadwarriors.com/uploads/1/3/1/4/131438308/0a84b628f7da.pdf
    • http://files.rooftoplocalhoney.com/uploads/1/3/2/6/132695455/tixab.pdf
    • http://files.leggingsusaonline.com/uploads/1/3/1/4/131482997/d9c5ac74d4400.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31995481059.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52209678420.pdf
    • https://cdn.shopify.com/s/files/1/0430/4135/7973/files/fomoso.pdf
    • https://cdn.shopify.com/s/files/1/0439/3802/1544/files/gopoxoviketigonijetu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/zijovojar.pdf
    • https://cdn.shopify.com/s/files/1/0431/8347/2802/files/82886410101.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexidemunuviviradepinitim.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/difupugabexopirerizoxut.pdf
    • https://cdn.shopify.com/s/files/1/0429/9689/1807/files/nopizofi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8212/8283/files/jomasavipiwovakifag.pdf
    • https://cdn.shopify.com/s/files/1/0428/5857/8086/files/metesikul.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f6a.bin
77055c2576daf549624bbad0709b9f367c86fe1ab5a57414eaae113aeb5399fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6A 5128 bytes
font_01_sfnt_off00007100.bin
77d4950436b409507647e750a5982db2e9c5faba2ae251291d6fa9a2a4430bf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7100 10404 bytes
font_02_sfnt_off000094d1.bin
bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94D1 16312 bytes
font_03_sfnt_off0000aa5c.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA5C 4324 bytes

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