Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba6247148cfcbe23…

MALICIOUS

PDF

41.0 KB Created: 2020-08-25 02:33:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 872cef03731537b1c08d32a0b57b3d47 SHA-1: f22a13fc46883b5e5f97c63ca12d26ed0725c073 SHA-256: ba6247148cfcbe23df06f27fae67bc06f65513e8430d296e1e0ca43bf17c9006
120 Risk Score

Malware Insights

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

The PDF document contains a link to a known malicious redirector, ttraff.ru, disguised as a cover letter template. It also exhibits characteristics of a PDF link farm, embedding numerous links to other PDFs hosted on various domains, likely for SEO manipulation or to distribute further malicious content. The primary attack vector appears to be social engineering through a seemingly legitimate document, leading users to a malicious site.

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=cover+letter+template+south+africa+pdf
    • http://files.metrodetroitreview.com/uploads/1/3/1/8/131856883/ziroladuti.pdf
    • http://files.bahrainaviators.com/uploads/1/3/2/6/132681855/c5a876d4a175.pdf
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/dipofozipoba.pdf
    • https://cdn.shopify.com/s/files/1/0437/0412/3557/files/titafexar.pdf
    • https://cdn.shopify.com/s/files/1/0432/5690/5885/files/55968457476.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/buzitanipemawisas.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5079/files/66346501001.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/bewaguxe.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/birazuditajukuvoxunedu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1892/7775/files/54527767543.pdf
    • https://cdn.shopify.com/s/files/1/0432/4494/5571/files/architectural_acoustics_marshall_long_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/basepizedowo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9902/1731/files/xexixu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6355/8815/files/45636383980.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/35621653896.pdf
    • https://cdn.shopify.com/s/files/1/0434/8998/4674/files/hold_my_liquor_lyrics.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_off000060ad.bin
f5204f6240080c3076230bedb7b6c0b7da1a9c292e43cf7ebca08513a9c96098		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60AD 5360 bytes
font_01_sfnt_off000072c6.bin
bc546e6086be6acb6807b2a4c68e279dfde5429deaebe986ff02741580bce4e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C6 10616 bytes

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