Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f3b5c7418387267…

MALICIOUS

PDF

39.6 KB Created: 2020-08-06 20:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b74f1b87654ad5628f5e449067c3f70 SHA-1: 039bff36ddc9449a846fb75ab26909d027ecdac2 SHA-256: 9f3b5c741838726709a6ae175ffbe49e5d72685799ae9871abf47dfd2d4068f8
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is used to obscure the final destination. The document body text and embedded links suggest a lure related to academic content ('Ampere s circuital law proof pdf'). No scripts were extracted, but the presence of numerous links, including one to a malicious redirector, indicates a phishing or redirection attempt.

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=ampere+s+circuital+law+proof+pdf
    • http://wukot.constant4mayor.com/uploads/1/3/1/8/131872055/6003f63672c198.pdf
    • http://files.ashraehrc.org/uploads/1/3/0/7/130774965/najitonojo-renusu-gugobisekobijaz.pdf
    • http://files.michaelcroghanphotography.com/uploads/1/3/0/7/130776273/3141ec90.pdf
    • https://cdn.shopify.com/s/files/1/0439/2127/7096/files/inquiry_into_life.pdf
    • https://cdn.shopify.com/s/files/1/0435/5971/4971/files/19288493681.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/topological_sort_java.pdf
    • https://cdn.shopify.com/s/files/1/0438/7880/9755/files/volaneparatugeduginoniv.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/51105253332.pdf
    • https://cdn.shopify.com/s/files/1/0433/0058/5636/files/92625924708.pdf
    • https://cdn.shopify.com/s/files/1/0431/5496/4637/files/kesigurupoponejef.pdf
    • https://cdn.shopify.com/s/files/1/0429/3486/1991/files/60580788952.pdf
    • https://cdn.shopify.com/s/files/1/0431/4952/5156/files/rolimapewojetekopasujog.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/dimomatosurudogaranerebuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/9470/3270/files/swash_plate_pump.pdf
    • https://cdn.shopify.com/s/files/1/0434/7808/9878/files/14675904930.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/jerivusex.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_off00005e21.bin
06cc9d49759051fd9c5cd8c8a338beddc50c55b194ccfddcd6a3c0f67d3899f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E21 5384 bytes
font_01_sfnt_off00007069.bin
6864bbd006b543630c506c614c717a9886c61e721c150ac9fcd4dc5fed6e8f27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7069 9632 bytes

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