Malicious PDF — malware analysis report

Static analysis result for SHA-256 a412b1680a197188…

MALICIOUS

PDF

46.3 KB Created: 2020-08-19 09:13:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80d76bb0eab7fd56fe0499299a25dbd5 SHA-1: 25c01f25a9abcbf1568f008d7ec70773e611a6f1 SHA-256: a412b1680a19718883b51464cb4fb503a9da984cafae1196283dab17dabe8d3e
120 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 'https://ttraff.cc/pify?keyword=first+grade+reading+worksheets+free+online'. This indicates the document's primary purpose is to redirect users to potentially harmful content. The presence of a PDF link farm heuristic further supports the malicious intent, suggesting an attempt to distribute malicious links or content. No scripts were extracted from this sample.

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/pify?keyword=first+grade+reading+worksheets+free+online
    • http://files.carvetta.com/uploads/1/3/1/3/131397938/rusopebuwawezirija.pdf
    • http://files.artistcafeutica.com/uploads/1/3/0/9/130969659/74de3e6.pdf
    • http://kusumutav.alexlanshe.com/uploads/1/3/2/3/132302870/db7f4c014.pdf
    • http://files.pacificbrows.co.uk/uploads/1/3/1/1/131164573/ce04e422d.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3356/files/56470360035.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5400/files/majakaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/85057313062.pdf
    • https://cdn.shopify.com/s/files/1/0428/9311/5558/files/10945518252.pdf
    • https://cdn.shopify.com/s/files/1/0428/0533/0083/files/swagify_all_spam_copy_and_paste.pdf
    • https://cdn.shopify.com/s/files/1/0434/8638/0189/files/29643336742.pdf
    • https://cdn.shopify.com/s/files/1/0430/4535/5682/files/30201492388.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/71273736884.pdf
    • https://cdn.shopify.com/s/files/1/0464/6404/1118/files/crca_sheet_grade_d.pdf
    • https://cdn.shopify.com/s/files/1/0430/9693/2505/files/99555025040.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_off000076d1.bin
38377cc5d23d9238101da0698770c176aaf28a4c8a9960cf899fb4d71af266a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76D1 5280 bytes
font_01_sfnt_off000088d2.bin
d44093e52a7d21f1d9035777f16f98428e2491fea82655ef4415d28114f1c775		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88D2 10368 bytes

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