Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd888401ccd3ae07…

MALICIOUS

PDF

77.7 KB Created: 2020-08-29 18:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0093341ec4eff9ea2fe650ede5c8de8 SHA-1: ef81ebe5c25402da5689eec3784b19ab3bc92d3a SHA-256: fd888401ccd3ae0732096a2516636d55c814e9942f475c17241584d0a54503b2
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic firing for a malicious redirector link. The primary malicious URL identified is https://ttraff.cc/wix?keyword=empi+300pv+manual. The document body appears to be obfuscated or corrupted, but the presence of the malicious link strongly suggests a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=empi+300pv+manual
    • https://static.usrfiles.com/ugd/b8c837_e5e6233c05c8430a99a0aaa36d5cb547.pdf
    • https://static.usrfiles.com/ugd/b8c837_d480769a35384017974c1bb12043c8d9.pdf
    • https://static.usrfiles.com/ugd/b8bbd7_18bc8464f9ef4af48d13f7d672f6a8ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2bfe7550c034fc0a0d9026a4d0f3553.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jatud.pdf
    • https://cdn.shopify.com/s/files/1/0432/6083/8050/files/10455188761.pdf
    • https://cdn.shopify.com/s/files/1/0430/6547/5229/files/22975524552.pdf
    • https://cdn.shopify.com/s/files/1/0433/5216/2462/files/53717480339.pdf
    • https://cdn.shopify.com/s/files/1/0433/4914/7803/files/99480584725.pdf
    • https://cdn.shopify.com/s/files/1/0437/1880/3605/files/85229209712.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84113106953.pdf
    • https://cdn.shopify.com/s/files/1/0434/7405/9424/files/duzimofolaxumenemuza.pdf
    • https://cdn.shopify.com/s/files/1/0433/2113/1161/files/metric_conversion_challenge_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/0740/8290/files/77039026236.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_off0000e63f.bin
1df0d20fd2272cebff24883d4dcb05b4b497a16f24adfac5cabb73181aeb5c54		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE63F 5012 bytes
font_01_sfnt_off0000f744.bin
a13f4897a610e5a7a08bef90d95b60e973d0e4709194126999cc4fabec800828		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF744 16300 bytes

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