Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9fe226a50e7e4ba…

MALICIOUS

PDF

41.2 KB Created: 2020-08-11 11:18:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d872f4bc81d8817ffbf2d33f8360646 SHA-1: bf7cb8031de24426215c9a173cda054ceef80622 SHA-256: c9fe226a50e7e4bacf0acbe940aff3ef09b40ce537634ec66089add8a0feb626
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a free Excel to PDF converter download. This indicates a phishing attempt to lure users to a malicious site. The document also contains a large number of embedded links, many pointing to Shopify, which is characteristic of SEO link farm tactics used to improve search engine ranking for malicious content.

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.cc/wb?keyword=excel%20to%20pdf%20converter%20free%20download%20app
    • http://files.loveforchinese.com/uploads/1/3/2/6/132683400/d13d828f7b69.pdf
    • http://files.rameyphotoco.com/uploads/1/3/0/8/130814858/lajamebimunezen.pdf
    • http://files.motherhoweslittlecows.com/uploads/1/3/1/4/131453967/favedomezanevej-sajobekovubox.pdf
    • https://cdn.shopify.com/s/files/1/0434/1569/9621/files/momebuk.pdf
    • https://cdn.shopify.com/s/files/1/0436/1597/7630/files/nexefatojarib.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/41707809853.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/return_vector_c.pdf
    • https://cdn.shopify.com/s/files/1/0437/4183/9514/files/accident_investigation_forms.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/78959259818.pdf
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/nivubemija.pdf
    • https://cdn.shopify.com/s/files/1/0430/5561/2058/files/oxford_bookworms_library_stage_1_titanic.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/79837360112.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0936/files/31880266538.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1421/files/62529497176.pdf
    • https://cdn.shopify.com/s/files/1/0429/0831/9903/files/decimal_number_line.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_off000063f1.bin
7399a7a76cd74d97df301092e39b9faf52576e283cdee7c4c1bfe66036ad0f9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F1 5148 bytes
font_01_sfnt_off00007599.bin
c76d1a4c513ca3f94343109450c862497e58aba707a9e3e91858197faa071cf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7599 10012 bytes

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