Malicious PDF — malware analysis report

Static analysis result for SHA-256 31d919c8951cf0d3…

MALICIOUS

PDF

42.5 KB Created: 2020-08-26 05:07:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 884a9130615126b6e6eadf3d195723bf SHA-1: fe1b5f413d8e9f6c4cd4f327d42ac178b0eb5dad SHA-256: 31d919c8951cf0d384c3fb2176c1e14f94d0f0d921f022029a6a0179deca7439
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one identified as a malicious redirector (ttraff.ru). This suggests the document's primary purpose is to lure users to a malicious site. The presence of a link farm heuristic further indicates an attempt to distribute content or traffic through numerous external links, many hosted on Shopify. No scripts were extracted, but the PDF structure and embedded links are sufficient to infer a malicious intent.

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=bdi+ii+printable
    • http://files.sebmakeup.com/uploads/1/3/2/7/132711947/6070822.pdf
    • https://cdn.shopify.com/s/files/1/0438/6498/1664/files/90580318419.pdf
    • https://cdn.shopify.com/s/files/1/0430/3205/1873/files/poguxajeroniri.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4012/files/34169383519.pdf
    • https://cdn.shopify.com/s/files/1/0430/2720/2205/files/applied_physics.pdf
    • https://cdn.shopify.com/s/files/1/0428/7276/6631/files/17138607319.pdf
    • https://cdn.shopify.com/s/files/1/0436/9491/5738/files/33297318915.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3573/files/10549895721.pdf
    • https://cdn.shopify.com/s/files/1/0437/3846/4405/files/midevil_wedding_rings.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4261/files/kamisama_hajimemashita3A_kamisama2C_shiawase_ni_naru.pdf
    • https://cdn.shopify.com/s/files/1/0433/7460/8545/files/mortal_kombat_x_cheats_ios.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_off00006a33.bin
49805dba2f640fb83dc9574015e878f954a335ee927a044ca721f583014f4b37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A33 4964 bytes
font_01_sfnt_off00007b19.bin
c1b53f0296e5a4afd0cf551b1fabd65e72b5b22edf7af372068dc5540059ea66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B19 10176 bytes

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