Malicious PDF — malware analysis report

Static analysis result for SHA-256 b37539ffe603001a…

MALICIOUS

PDF

49.1 KB Created: 2020-08-09 05:01:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46d72056905ec0f5244e0b11582641e2 SHA-1: 4b571a87742d060accf613b9fdfdc5e82ec7b0dc SHA-256: b37539ffe603001a66f000f6dbcb1cf5d17918cd3a0a4ebbe13089acf3dc4b30
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass link farm, with a critical heuristic firing for a malicious redirector pointing to 'https://ttraff.com/pify?keyword=french+stories+for+beginners+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. The document body itself is heavily obfuscated but contains the same lure text and URLs found in the heuristics.

Heuristics 3

  • 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.
  • 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=french+stories+for+beginners+pdf
    • http://files.owtheatre.com/uploads/1/3/0/7/130775737/vasunabimigavozag.pdf
    • http://files.fanconorthbay.org/uploads/1/3/1/3/131381540/javuk_tisinilamugewef.pdf
    • http://files.unifor2301.org/uploads/1/3/1/3/131379296/texodo-nigejubizexuvur-lazivigusitoti.pdf
    • http://tugogupo.rytiskonst.com/uploads/1/3/1/4/131453133/didasitatez_vipunixo_gosal_lezizigunujus.pdf
    • https://cdn.shopify.com/s/files/1/0428/2862/8124/files/24729007280.pdf
    • https://cdn.shopify.com/s/files/1/0431/7695/1957/files/26090187976.pdf
    • https://cdn.shopify.com/s/files/1/0434/1425/7815/files/87682361614.pdf
    • https://cdn.shopify.com/s/files/1/0434/0973/5845/files/sewavalotijo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7503/4520/files/besobijaneguxebu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6988/8920/files/list_of_root_words_prefixes_and_suffixes.pdf
    • https://cdn.shopify.com/s/files/1/0428/5127/0823/files/61162024529.pdf
    • https://cdn.shopify.com/s/files/1/0430/0416/6297/files/94822684133.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/xixokugupixepu.pdf
    • https://cdn.shopify.com/s/files/1/0439/6980/6494/files/biophilic_interior_design.pdf
    • https://cdn.shopify.com/s/files/1/0428/1755/2543/files/98758746628.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_off00007b9b.bin
40251e00813c4c1f93e64cb74ce2b594f8c31c532cfab029fab013cdb6d5741e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9B 5268 bytes
font_01_sfnt_off00008d82.bin
62e7257beebd039586c902cf391a69fb6d59fdd88a37a4bf253b08577efe2d86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D82 12996 bytes

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