Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f28cdd8ed9037dd…

MALICIOUS

PDF

41.6 KB Created: 2020-08-12 07:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e8008cd6e4ffd6ea665add1974bfcf2 SHA-1: ee14f4ed676195244aa0cf9548da35e4d44bf430 SHA-256: 3f28cdd8ed9037dd9fae0b240956dc67fcbddd930d8293cc6670b5c39fd5527a
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.ru/pify?keyword=unix+shell+programming+tutorials+point+pdf', is designed to lure users by appearing to offer programming tutorials. The PDF also contains a large number of external links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The primary malicious IOC is the redirector URL, which likely leads to further 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.ru/pify?keyword=unix+shell+programming+tutorials+point+pdf
    • http://files.ferrisstudios2.com/uploads/1/3/1/4/131407709/f2de5f8f327b91.pdf
    • http://files.wellthplanner.com/uploads/1/3/1/3/131382590/6686412.pdf
    • http://sefobuj.nicholasmongiardocooper.com/uploads/1/3/1/4/131482995/xisew.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4711/files/nomimojaguzujazo.pdf
    • https://cdn.shopify.com/s/files/1/0449/3633/1419/files/definition_of_reliability_in_research.pdf
    • https://cdn.shopify.com/s/files/1/0449/5812/2139/files/sample_industrial_attachment_application_letter.pdf
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/82732472283.pdf
    • https://cdn.shopify.com/s/files/1/0431/7046/3895/files/sugajitoxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/lokewomagew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69440205977.pdf
    • https://cdn.shopify.com/s/files/1/0431/7147/9713/files/xejizokotarefarideserodip.pdf
    • https://cdn.shopify.com/s/files/1/0437/7742/5565/files/13999075526.pdf
    • https://cdn.shopify.com/s/files/1/0430/6662/2105/files/97634299117.pdf
    • https://cdn.shopify.com/s/files/1/0430/7858/2439/files/sophisticated_lady_ellington.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/24279367806.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_off00005fe2.bin
a5149221388bcb539166bfb9ba34d1d0dd9ab9e4a4a2f829350d69946633e714		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE2 5512 bytes
font_01_sfnt_off00007277.bin
dde4e5b1d3e2c22886a0c707f63c12abc32b664118d159b62791da21186d0f50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7277 12068 bytes

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