Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f05fe19c4cf2a1…

MALICIOUS

PDF

123.9 KB Created: 2020-08-21 10:41:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e183be744ec67e3cdba36fc66d2500a SHA-1: cc4af80c3790e7fb5cbc275bcf60fa0f23d393f7 SHA-256: 67f05fe19c4cf2a19ca2c9329a96e3584d1fb1cf0bd3bd43a7a46047c1a39c0e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier also flagged the PDF as malicious. No scripts were extracted, but the presence of a malicious redirector and link farm points to a phishing or content distribution attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8786

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.ru/pify?keyword=marathi+bhajan+gaulani+free
    • http://tixigun.janiceragoart.com/uploads/1/3/1/6/131606183/lunatolutapebitop.pdf
    • https:///1414510/1414510/crop_175x175_1414510.jpg��,albumartwork_large
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0688/5027/files/fakebudexox.pdf
    • https://cdn.shopify.com/s/files/1/0432/5919/9650/files/lepibuwonareduvevaz.pdf
    • https://cdn.shopify.com/s/files/1/0449/0018/8327/files/28608639197.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/84084145325.pdf
    • https://cdn.shopify.com/s/files/1/0432/6726/0582/files/fesije.pdf
    • https://cdn.shopify.com/s/files/1/0434/3712/9895/files/sukagetikafomekovuni.pdf
    • https://cdn.shopify.com/s/files/1/0437/9528/4130/files/wanenutulowenunawaz.pdf
    • https://cdn.shopify.com/s/files/1/0437/7945/7173/files/sciatica_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0428/3914/6662/files/gepud.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ade7.bin
5063cee0e2090cc0a02d6da30f5c1b67c7466ef75866b1120932929c77c91119		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1ADE7 5072 bytes
font_01_sfnt_off0001bf31.bin
4b33b9a36007c38d3967589bfc3f40101b9aa0174620cb1fab972d2f18837857		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF31 14684 bytes

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