Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f3d6c6dbc980a44…

MALICIOUS

PDF

39.3 KB Created: 2020-07-31 21:19:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af275876d9b7e0376c76fea4c7f570c7 SHA-1: 6e88cff1dbf9523e4df18d70439259cf0a44e505 SHA-256: 1f3d6c6dbc980a4423aab1aa0ba6d2d8ea8520d2f96407660cb8c3cb78f0d437
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL. This URL is likely used to redirect the user to a malicious site, potentially for further exploitation or credential harvesting. The PDF also contains a large number of external links, many hosted on shopify.com, which is flagged as a link farm.

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=what+is+encapsulation+in+java+with+example
    • http://files.rabbimeltzer.com/uploads/1/3/1/4/131453350/negopi.pdf
    • http://files.potofgreenflorist.com/uploads/1/3/1/4/131438843/7e0ecffbecb2402.pdf
    • http://files.callkatetidy.com/uploads/1/3/1/6/131606550/53c1c481e0ea3.pdf
    • https://cdn.shopify.com/s/files/1/0431/2789/8268/files/56725302952.pdf
    • https://cdn.shopify.com/s/files/1/0430/3867/1010/files/gewexajudixafa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61286624564.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ledoviz.pdf
    • https://cdn.shopify.com/s/files/1/0428/6762/2055/files/41824743258.pdf
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/ramomizaloseba.pdf
    • https://cdn.shopify.com/s/files/1/0439/3828/3678/files/84364744667.pdf
    • https://cdn.shopify.com/s/files/1/0431/3396/0341/files/48340948144.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/texirid.pdf
    • https://cdn.shopify.com/s/files/1/0429/4557/7116/files/17393523215.pdf
    • https://cdn.shopify.com/s/files/1/0428/6231/3639/files/3927231344.pdf
    • https://cdn.shopify.com/s/files/1/0433/7369/1045/files/microsoft_office_2003_dowload.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_off00005b44.bin
e4455198ca0a67e5720a07694a08a3f58e5cc52801a71b403f8c46f78d3a0d23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B44 5384 bytes
font_01_sfnt_off00006d95.bin
a27ea16b005e46391cc76723c7db044a139114b6bfd5b36f13e207314589238f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D95 10208 bytes

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