Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7c35326ca2594ae…

MALICIOUS

PDF

47.8 KB Created: 2020-07-28 09:28:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a67e94e65204e73ea4c0dd06ca373316 SHA-1: 0c4727cbae9ab04ddd2a7c5ce911ccd9b4422dc7 SHA-256: f7c35326ca2594aecf5c47a13f19ac9d0593f8d9e7383e1d818e3cd6fbd2f7dd
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector pointing to 'ttraff.com'. This URL is part of a link farm strategy, attempting to direct users to potentially harmful content. The document body, though heavily obfuscated, contains text related to 'Postage rate sheet 2018', suggesting a lure to disguise the malicious intent. The ML classifier also strongly indicated maliciousness.

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=postage+rate+sheet+2018
    • http://files.hookedontravelagency.com/uploads/1/3/0/7/130776602/2848163.pdf
    • http://files.transitionplan.org/uploads/1/3/1/4/131453847/a29466a0.pdf
    • http://files.eaglemountainvolleyball.com/uploads/1/3/1/3/131379540/37adb.pdf
    • http://files.csi1000.us/uploads/1/3/2/3/132303081/dfff4c9359.pdf
    • https://cdn.shopify.com/s/files/1/0436/8600/2843/files/7581293118.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/bovofinodiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9302/files/53744789584.pdf
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/86167292194.pdf
    • https://cdn.shopify.com/s/files/1/0435/9208/9759/files/ruvonufadid.pdf
    • https://cdn.shopify.com/s/files/1/0435/7246/1727/files/vapoza.pdf
    • https://cdn.shopify.com/s/files/1/0427/9717/0847/files/9166245888.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/86217743296.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8947/files/8751491928.pdf
    • https://cdn.shopify.com/s/files/1/0440/6296/5912/files/nafet.pdf
    • https://cdn.shopify.com/s/files/1/0429/9699/0105/files/489784929.pdf
    • https://cdn.shopify.com/s/files/1/0437/0432/0154/files/nikapebagefidakezotizuwuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/8349/7623/files/kulef.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/1/04

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072dc.bin
3e66e999bacaa4ed3622a35f9e5d454931c4db9c448c76bf15e30a758a148685		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72DC 5068 bytes
font_01_sfnt_off00008424.bin
d9787ca391a8d9b04c6e9ca20cde8603facac40a6652d28e09e3ccf2f1a6d94a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8424 14720 bytes

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