Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4ab287762d0269a…

MALICIOUS

PDF

38.3 KB Created: 2020-07-30 21:00:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59ad2fec7c36dfcc1f037dfeb92adff9 SHA-1: 351067ff898bf1a85f1ae94ac005d4b9405288b4 SHA-256: a4ab287762d0269aae3463f4df5f2dd20ea42195763fdbf086a4328ffef09c17
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm or SEO poisoning campaign. One critical heuristic identified a link to a known malicious redirector at 'ttraff.ru'. The document body is heavily obfuscated and does not provide clear textual lures. 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/pify?keyword=atmega88pa+pu+pdf
    • http://files.royalgymnastics.com/uploads/1/3/0/7/130775441/958381.pdf
    • http://files.accurateinspectionsllc.com/uploads/1/3/0/9/130969053/mulefegos-zixudemataw.pdf
    • http://files.thesanctuaryatmn.com/uploads/1/3/1/8/131856184/d83262d07.pdf
    • https://cdn.shopify.com/s/files/1/0428/9573/6988/files/bukuwafesejefikowadi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5657/0266/files/viwab.pdf
    • https://cdn.shopify.com/s/files/1/0430/7963/1001/files/tebuduniv.pdf
    • https://cdn.shopify.com/s/files/1/0438/6829/1227/files/1652690382.pdf
    • https://cdn.shopify.com/s/files/1/0440/4068/3685/files/xojobekokadiba.pdf
    • https://cdn.shopify.com/s/files/1/0432/0985/1048/files/wipogutoveven.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76957488457.pdf
    • https://cdn.shopify.com/s/files/1/0440/3331/0870/files/juresitutenimivovet.pdf
    • https://cdn.shopify.com/s/files/1/0427/8855/2870/files/57833763321.pdf
    • https://cdn.shopify.com/s/files/1/0435/3143/6186/files/63298368357.pdf
    • https://cdn.shopify.com/s/files/1/0428/5045/1623/files/58685095130.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/funenuvowigotipono.pdf
    • https://cdn.shopify.com/s/files/1/0433/8604/4572/files/zamiveni.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dosoxuwananeworatimuk.pdf
    • https://cdn.shopify.com/s/files/1/0439/0292/7003/files/96244214798.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/
    • https://cdn.shopify.com/s/f

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a89.bin
051852c010899f59f22ef28bd4599dc16c030945a5c9e3a0b4532e6f6719bef6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A89 4856 bytes
font_01_sfnt_off00006b0f.bin
8ac3961754730c6eb2b3df94c502243b8cfe48f23ce9f5d000d775c6506d9fe4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B0F 9760 bytes

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