Malicious PDF — malware analysis report

Static analysis result for SHA-256 33835d6615933088…

MALICIOUS

PDF

46.1 KB Created: 2020-07-30 19:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e8a8c3dc50b97013589ece7383160c0 SHA-1: 9c66c840152b6081f4ef143a27ad364643b684ce SHA-256: 33835d661593308859eee79e2915b57a4518dee722306147bbcf16bee154eb40
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to PDF manipulation, suggesting a lure. The primary malicious URL identified is ttraff.com, which is used in conjunction with a keyword related to PDF merging. The presence of a link farm heuristic further supports the SEO spam or phishing lure.

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.com/pify?keyword=fusionner+des+pdf+avec+foxit+reader
    • http://files.jamestruslerphotography.com/uploads/1/3/1/4/131453252/wemeji.pdf
    • http://files.thevillagelhc.org/uploads/1/3/1/3/131381850/2599034.pdf
    • http://files.908elmstreet.com/uploads/1/3/1/4/131454899/najula-wumulupotumo-parewok-bitapapufo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zetelonum.pdf
    • https://cdn.shopify.com/s/files/1/0429/6248/5407/files/60566414075.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57148414383.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84113106953.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kekesapenogetiru.pdf
    • https://cdn.shopify.com/s/files/1/0430/9860/3669/files/palokowanadapab.pdf
    • https://cdn.shopify.com/s/files/1/0437/2175/2731/files/suvadelirelojoxotuxoviv.pdf
    • https://cdn.shopify.com/s/files/1/0435/7275/6648/files/nejero.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57917948996.pdf
    • https://cdn.shopify.com/s/files/1/0430/6318/1463/files/ferebofejivepezini.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/68614432262.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/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/k

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b4f.bin
8a71c4142ffe21feb254a6c16407ef5aed40baada1da18e1925a34d4cbe76beb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4F 5084 bytes
font_01_sfnt_off00007cab.bin
9f0b320a430bc6876215d8d57df2908468fbe467131e81291a6c262684e76240		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAB 14908 bytes

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