Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cb76ce8adb7ac86…

MALICIOUS

PDF

42.2 KB Created: 2020-08-17 17:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4183c02499e3a0fd4a81209cf872fe68 SHA-1: 216afdd9278795bfccb0b9603752fea6743ae34a SHA-256: 9cb76ce8adb7ac86e36168b54ce5985826c13ad5383d47a78c869264e504aedd
140 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector heuristic. The presence of a callback phishing lure suggests a social engineering attempt to trick the user into calling a fraudulent number, likely related to the malicious links.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=block+internet+sites+android
    • http://files.besthairextensionswilmington.com/uploads/1/3/0/7/130776745/favomogudezi.pdf
    • http://files.roanokerange.com/uploads/1/3/1/6/131636984/8697d31110a.pdf
    • https://cdn.shopify.com/s/files/1/0433/0897/4235/files/24347439953.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5589/files/zonegudonawofol.pdf
    • https://cdn.shopify.com/s/files/1/0432/6775/2099/files/zevovavuko.pdf
    • https://cdn.shopify.com/s/files/1/0434/4394/5622/files/jeretegofinajo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41718344304.pdf
    • https://cdn.shopify.com/s/files/1/0430/7674/7413/files/welafafoligusibawe.pdf
    • https://cdn.shopify.com/s/files/1/0430/9119/8112/files/sekawil.pdf
    • https://cdn.shopify.com/s/files/1/0429/1490/6275/files/vofogotafuw.pdf
    • https://cdn.shopify.com/s/files/1/0436/9186/8313/files/makalah_tentang_autisme.pdf
    • https://cdn.shopify.com/s/files/1/0431/9713/7056/files/38131080960.pdf
    • https://cdn.shopify.com/s/files/1/0434/3712/9895/files/activity_books_for_4_5_year_olds.pdf
    • https://cdn.shopify.com/s/files/1/0434/1461/8277/files/vertical_and_horizontal_lines_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fusuzirosaf.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_off000067af.bin
34d41fbe811ca681bbd291c668a1b2fe2d14f6ac14f7c2cfaa3e6ca81245a187		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67AF 5044 bytes
font_01_sfnt_off000078d6.bin
4421865a4273d917c8110c57b32b68666fcc2cd449db5cca0a4705657b60cc37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78D6 10328 bytes

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