Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6ceac0351e61292…

MALICIOUS

PDF

48.2 KB Created: 2020-09-04 14:24:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44082b097856305b3561711629d0a0b3 SHA-1: 1140a9efb7ff7875a65f92d994e88cbe265dea49 SHA-256: f6ceac0351e61292661f260a7c85a13ad382886b17642186ab73e3840aa48b40
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a crossword puzzle and the malicious URL itself. The PDF_SEO_LINK_FARM heuristic indicates a large number of embedded links, suggesting a link farm or SEO poisoning attempt to drive traffic to malicious sites. The primary malicious IOC is the redirector URL.

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.club/wix?keyword=literary+terms+crossword+puzzle+ms.+pena+answers
    • https://static.usrfiles.com/ugd/865d50_2f23bc1e7bea49d6a221595e99bae383.pdf
    • https://static.usrfiles.com/ugd/bb3bf9_e53150df51d44eb0adb9685d73883595.pdf
    • https://static.usrfiles.com/ugd/93971e_6959e3a819dd45eba920d0cd23d74779.pdf
    • https://static.usrfiles.com/ugd/921909_5ce18435a8004cb491c17d333ebf62dc.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1641/files/66915608875.pdf
    • https://cdn.shopify.com/s/files/1/0433/7106/9594/files/nevenivu.pdf
    • https://cdn.shopify.com/s/files/1/0457/3324/9190/files/friends_bloopers_all_seasons_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/3672/0798/files/xoludijixaburijisubixe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/depuwi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7786/8443/files/tiveranimitusige.pdf
    • https://cdn.shopify.com/s/files/1/0432/7548/5348/files/regression_testing_template_document.pdf
    • https://static.usrfiles.com/ugd/8ab72e_5b41dc4938114a20acb7096a91ec5fd5.pdf
    • https://static.usrfiles.com/ugd/3aee12_61adea49e6244a5c9165fa10d32e1a5b.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_off00007ed1.bin
f2e5761440ba76e454039e65541073d3b91a2f866ac0cd93b02d886d48046e6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED1 5436 bytes
font_01_sfnt_off00009160.bin
6b74437169631ebcade4e921c7a6b8e5eeb9e607b02ee65168724f29cb1e2930		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9160 10180 bytes

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