Malicious PDF — malware analysis report

Static analysis result for SHA-256 a33ffdaee17f6858…

MALICIOUS

PDF

42.5 KB Created: 2020-08-08 01:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 741caab3f7901013a8cd8599245a3eee SHA-1: 71a497138ee8957533ac22b5c0f3624a2182ec35 SHA-256: a33ffdaee17f6858ea812c3e1ca10f24342586861b55d36d8dbaca6d2c3cd53c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link to a known malicious redirector, ttraff.cc, disguised as a carburetor parts identification worksheet. The document body, though heavily obfuscated, contains the same lure text and the malicious URL. The PDF also hosts a large number of external links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic to distribute the malicious content.

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/wb?keyword=carburetor%20parts%20identification%20worksheet
    • http://files.gotmygoat.com/uploads/1/3/0/8/130814717/vakolivofenoxuzef.pdf
    • http://files.cornishluxuryretreat.co.uk/uploads/1/3/1/8/131856772/kupawades.pdf
    • http://files.firstcovenantsuperior.org/uploads/1/3/1/6/131636903/867872.pdf
    • https://cdn.shopify.com/s/files/1/0432/1024/4256/files/96582614811.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3581/files/floats_in_python.pdf
    • https://cdn.shopify.com/s/files/1/0438/2212/1122/files/zaxov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9573/6988/files/fewomazirixisusage.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/veromuzejatenitato.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7429/files/jozutid.pdf
    • https://cdn.shopify.com/s/files/1/0434/1448/7190/files/ponipofajoposaluseletufaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/87134814777.pdf
    • https://cdn.shopify.com/s/files/1/0430/4892/7386/files/12795244763.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/philips_universal_remote_manual.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_off000068b4.bin
2c83dea587758a43738c407de977f94e066c6f18ceee6f74f622b1734ae6fb09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68B4 5412 bytes
font_01_sfnt_off00007b24.bin
b6460d47ab0328c6d0c13f03cb802c78e8bdca80b50bdf52de97ed47b368f16d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B24 9860 bytes

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