Malicious PDF — malware analysis report

Static analysis result for SHA-256 514df223404ded5f…

MALICIOUS

PDF

31.7 KB Created: 2020-08-31 04:22:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b01a28a59dade4fd7f4b061c4d741c4 SHA-1: b224d63a1680a646138ab7e6209d8a0ddff364b4 SHA-256: 514df223404ded5f628795c492c538fe7768f20a0756a88d56e409cbbc9b182e
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 ttraff.ru. The document body, though heavily obfuscated, contains text related to a 'caterpillar 3508 diesel engine service manual pdf download' and the malicious URL itself. The PDF also contains a mass external PDF link farm, with many links hosted on static.usrfiles.com, suggesting a SEO-based lure to drive traffic to malicious sites.

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=caterpillar+3508+diesel+engine+service+manual+pdf+download
    • https://static.usrfiles.com/ugd/9a242c_786a4adb6416416db231299e2241a556.pdf
    • https://static.usrfiles.com/ugd/19103d_107f92add802426397cb4bb9d87764de.pdf
    • https://static.usrfiles.com/ugd/b8c837_3a4ea0cd60014030b103700e0c3e7d7e.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_6f5b7c0c900140128fdf7256121e0d50.pdf
    • https://cdn.shopify.com/s/files/1/0433/0985/8984/files/lalebume.pdf
    • https://cdn.shopify.com/s/files/1/0439/4765/5323/files/36359457109.pdf
    • https://static.usrfiles.com/ugd/80bfa9_cf8ce1c5ffde42289e7b4bafb55ee76b.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc2a8d158dd94335a705d6c1246d6646.pdf
    • https://static.usrfiles.com/ugd/ea5d7b_21ceb399d3b24a8cac7c07870ed65efa.pdf
    • https://static.usrfiles.com/ugd/0bcf16_916856c9fc0c41de8396b079c1ce0d37.pdf
    • https://static.usrfiles.com/ugd/b972d5_159e41c6f53c4526b9d4dfcd90ee751f.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_off00003f35.bin
3e3b58a6dc4fe845e343202de02a6e45408c2ce777940178efd44c3ce1ed59ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3F35 6156 bytes
font_01_sfnt_off00005422.bin
e7476b39cf78b65c93a329d1670212ea7b9e0e53de0e8ab78e4d71b8e4ee80bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5422 8752 bytes

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