Malicious PDF — malware analysis report

Static analysis result for SHA-256 a78035e8b1ad0e7a…

MALICIOUS

PDF

41.5 KB Created: 2020-08-31 12:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f35e29f6aa6d2fc08f0b9e026b45893 SHA-1: 3c7b0b32ddf4187af67dc83d05b0d81bfd0fdc60 SHA-256: a78035e8b1ad0e7a1c03b4aec21a95919c9fa832854b74e06f97ca97b8fac250
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one critical heuristic identifying it as a malicious redirector. The document body explicitly mentions 'ds4 profiles download' and includes a URL pointing to a redirector service, suggesting an attempt to trick users into downloading further content. The presence of numerous external PDF links, many hosted on Shopify, further supports the link farm and redirection attack pattern.

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/wix?keyword=ds4+profiles+download
    • https://cdn.shopify.com/s/files/1/0447/9365/9543/files/79760514334.pdf
    • https://cdn.shopify.com/s/files/1/0463/8510/3003/files/2017_chevrolet_equinox_lt_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/5318/5174/files/babomusad.pdf
    • https://cdn.shopify.com/s/files/1/0431/9405/6861/files/89691322593.pdf
    • https://cdn.shopify.com/s/files/1/0429/2214/8003/files/aac_to_mp3_converters.pdf
    • https://static.usrfiles.com/ugd/b8c837_012066c4100a4d72aa42819e8794940d.pdf
    • https://static.usrfiles.com/ugd/a1fb72_a22247f0d1524799a115176e87eaab0a.pdf
    • https://static.usrfiles.com/ugd/b8c837_f8cc68935adc467fb3a9019a5b0e1e85.pdf
    • https://static.usrfiles.com/ugd/b8c837_a8a5c00ffe6a4e989d73a36d8f216866.pdf
    • https://static.usrfiles.com/ugd/3f80ec_f5cfd45aab5b42fd82dc4e357a62d600.pdf
    • https://cdn.shopify.com/s/files/1/0433/9017/3349/files/posatununonezovopo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2755/4723/files/resumo_bactrias.pdf
    • https://cdn.shopify.com/s/files/1/0433/7949/0968/files/83999327611.pdf
    • https://cdn.shopify.com/s/files/1/0430/3768/7962/files/35621237135.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_off00005d11.bin
d6e99ffd5807336281583c695429ba04db2bc50dd31cb305a69061cedcad1b28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D11 5212 bytes
font_01_sfnt_off00006ef9.bin
785632c0d328a3efe28a4ecaf54a41e1d2bdf90380650a55a03f6461a31d2891		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF9 13272 bytes

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