Malicious PDF — malware analysis report

Static analysis result for SHA-256 3331988a44de814c…

MALICIOUS

PDF

39.1 KB Created: 2020-08-20 00:12:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b2fde9d1d117fbd7aaf27f0da288065 SHA-1: 308b51882396b61dbe1c53a6e80b9c5905b847a8 SHA-256: 3331988a44de814c1e8dd9bf733b87696638cb716fa31340b27fdb3038625310
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to `ttraff.ru`. This domain is flagged as a malicious redirector. The document body contains garbled text and the URL `https://ttraff.ru/pify?keyword=astm+standards+2014+free`, suggesting a lure to download a PDF related to 'astm standards 2014 free' which ultimately leads to malicious infrastructure.

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=astm+standards+2014+free
    • http://files.wirefreebra.com/uploads/1/3/0/9/130970003/fcb11fd8c.pdf
    • http://files.reneytours.com/uploads/1/3/1/3/131383575/viganevim-xuxametosimunun-jegivuvusarog.pdf
    • https://cdn.shopify.com/s/files/1/0435/1806/6843/files/jeveli.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/73251547492.pdf
    • https://cdn.shopify.com/s/files/1/0432/6447/5299/files/kimazunexenudibilasuvek.pdf
    • https://cdn.shopify.com/s/files/1/0432/8210/4478/files/abc_english_grammar_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/giwulaxanajewes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9242/7430/files/1667678778.pdf
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/fallout_4_cybernetics.pdf
    • https://cdn.shopify.com/s/files/1/0436/6237/7113/files/18012675183.pdf
    • https://cdn.shopify.com/s/files/1/0438/5662/5829/files/6480379494.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_off00005bde.bin
0e479977556def67d9e84d7abb767d1b17588acad7d05dc1265d5064ac4fda27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BDE 5424 bytes
font_01_sfnt_off00006e37.bin
6b0e678c356fd3dbdf00a5ac16a50bf2a9b80d5623db3aa82410989f92c39dd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E37 9896 bytes

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