Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7bf6944ed014e29…

MALICIOUS

PDF

38.3 KB Created: 2020-08-19 06:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ccb0ae5f93d1358b036e21e9dd27d39 SHA-1: 951c771e0fe66dbd0bb785e5eb26eb9a80e9fe08 SHA-256: f7bf6944ed014e299000ad55966c989fc42ff84d93e07833acf0f3014ec3e5e8
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=please+answer+questionnaire'. This URL is likely part of a phishing or scam campaign, attempting to trick users into believing they need to answer a questionnaire. The document body, though heavily obfuscated, contains the same URL, reinforcing the lure. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains, likely for SEO manipulation or to host further 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.com/pify?keyword=please+answer+questionnaire
    • http://xopubidu.twoa-aawoa.org/uploads/1/3/2/6/132696414/5436153.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/49589524434.pdf
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/87837165425.pdf
    • https://cdn.shopify.com/s/files/1/0431/0047/1456/files/lubujol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/josuzafegeda.pdf
    • https://cdn.shopify.com/s/files/1/0434/5017/1554/files/21960954335.pdf
    • https://cdn.shopify.com/s/files/1/0429/6415/6575/files/mavisenesenoxipu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/vorolafonuxoxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9306/5877/files/wagekikajopes.pdf
    • https://cdn.shopify.com/s/files/1/0434/8100/6244/files/kundalini_yoga_poses.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/maraji.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_off00005919.bin
cb538a67315684055367501c61f88e8a8577b0925d979848b84eef764cdc7a90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5919 4900 bytes
font_01_sfnt_off000069df.bin
784083d53e8b285454c42c155fb2397d8a184456f02d10055a59ded876daaf74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69DF 10304 bytes

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