Malicious PDF — malware analysis report

Static analysis result for SHA-256 356f3edb41da6eb0…

MALICIOUS

PDF

44.1 KB Created: 2020-08-30 08:37:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7da9b7dfd5a36fc4b6c69f43d742b85f SHA-1: 848a913e72790669e342a7032b38453e15540fc3 SHA-256: 356f3edb41da6eb0cd2a4617964617eb97b7103babbc50794b074cb2efc973f4
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=spitting+in+the+client%2527+s+soup'. The document body, though partially corrupted, includes this same URL and a title that appears to be a lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to benign content hosting services but are likely used to obscure the malicious redirector. 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.ru/wix?keyword=spitting+in+the+client%2527+s+soup
    • https://static.usrfiles.com/ugd/003b86_602c07350af64c3fb42cabf8e43932ae.pdf
    • https://static.usrfiles.com/ugd/9219f8_f0fcaeb2e5564c5d89cd46c4a0ed9e5f.pdf
    • https://static.usrfiles.com/ugd/7dd30d_87d700ff937c4733b3b0d8ed67858057.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8516/files/37257862451.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/dubuxelatud.pdf
    • https://cdn.shopify.com/s/files/1/0432/3423/0429/files/9296722820.pdf
    • https://static.usrfiles.com/ugd/b8c837_c3954f0b56d548478077c4952f816435.pdf
    • https://static.usrfiles.com/ugd/4b874d_6b98eb7e683344cca8698df32a552515.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d8a2d61ca7443adb6fc1a05c5d2f4b2.pdf
    • https://cdn.shopify.com/s/files/1/0429/3876/1379/files/nifurawedowutiv.pdf
    • https://cdn.shopify.com/s/files/1/0435/3222/2615/files/xefunobigesob.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7589/files/putetikofukoxujepaligeba.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2459/files/82234365155.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006286.bin
e03a51170b183ed4d224a2deac5795be24248706c7e9d41bc5cb60b58da11d5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6286 4908 bytes
font_01_sfnt_off00007344.bin
24f15b28a18601d8af270bae0054a9c6bf6bdd78e5ad1e0ca5f2403634fe9da1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7344 10064 bytes
font_02_sfnt_off000095c1.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95C1 4324 bytes

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