Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f5b4f3cb02360ed…

MALICIOUS

PDF

40.6 KB Created: 2020-09-02 02:20:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee33c73efef2dc180e7fa484a536744d SHA-1: 42ee29c907903e9b9fe763f9b9fe03495149ac3e SHA-256: 3f5b4f3cb02360ed0e4b0674e0e87058c4b33ac8fc4e53d0fdcec26b6882a785
130 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is associated with a lure for 'bumble dating app apk'. The document also contains a mass external PDF link farm, with many links pointing to 'static.usrfiles.com'. The presence of a malicious redirector and the SEO link farm suggest an attempt to drive traffic to malicious content, likely for phishing or malware distribution.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wix?keyword=bumble+dating+app++apk
    • https://static.usrfiles.com/ugd/409ca8_934085731bbc4dca8872710ee32e2e88.pdf
    • https://static.usrfiles.com/ugd/b8c837_f29dbe6388f34a2faca08ee955dd491a.pdf
    • https://static.usrfiles.com/ugd/3be3a7_c833842205f94b45a458257adc00c765.pdf
    • https://static.usrfiles.com/ugd/e3c460_79b48e3009bc46f7855638923c7649d8.pdf
    • https://static.usrfiles.com/ugd/73f3b0_857f514646084b4191c92fcaac687db4.pdf
    • https://static.usrfiles.com/ugd/4fb05f_fd031170956f4460bd5938d49d64363e.pdf
    • https://static.usrfiles.com/ugd/fd30ac_9919a44570004923a611ec2f115874f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2c7ec019d1240dc8bf1d6f825b46b2f.pdf
    • https://static.usrfiles.com/ugd/dd6616_a16aada5dab04ee79a161a416aadf927.pdf
    • https://static.usrfiles.com/ugd/b85eb0_594bdf2db44842f48d6f61e376698d3c.pdf
    • https://static.usrfiles.com/ugd/b8c837_76c30cc56cbc4a86933abdb895df313a.pdf
    • https://cdn.shopify.com/s/files/1/0461/8236/7385/files/dmv_cheat_sheet_ny.pdf
    • https://cdn.shopify.com/s/files/1/0434/6504/8214/files/renal_angiomyolipoma_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0436/0349/3026/files/37360445802.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_off00006103.bin
275c90b192618a3ce8848d7a0ce6a019ef9373c53c6c72574797bf91eaca2897		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6103 5260 bytes
font_01_sfnt_off000072cd.bin
894f0c163ea1828f4912b9a0c6fb531b3d8ccf3566699f8e4bdf287fea5ec696		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72CD 10424 bytes

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