Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4c3a988e08e1ad7…

MALICIOUS

PDF

50.3 KB Created: 2020-08-21 13:17:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f224794caecc4d5b3066d8610e3c750f SHA-1: a9136fd343cacedacd69662fa7ad9053e6ddc434 SHA-256: a4c3a988e08e1ad7f61c492fa25d3e3e27f8a48fddddb559fdf05bf4ecc053d9
130 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. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the link at 'https://ttraff.ru/pify?keyword=ga+mandated+reporter+law' leads to known malicious infrastructure. The 'PDF_SEO_LINK_FARM' heuristic further suggests a pattern of hosting numerous PDFs on benign-looking domains like Shopify to obscure malicious intent. No scripts were extracted, but the document body and heuristics point to a phishing or redirection attack.

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=ga+mandated+reporter+law
    • http://files.toritenacity.com/uploads/1/3/1/3/131380467/7725562.pdf
    • http://files.lashdollzuk.com/uploads/1/3/1/1/131164519/cb5a4f1a95529.pdf
    • https://cdn.shopify.com/s/files/1/0438/3142/7234/files/93839074851.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/99670705744.pdf
    • https://cdn.shopify.com/s/files/1/0438/2933/0077/files/utorrent_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/3899029217.pdf
    • https://cdn.shopify.com/s/files/1/0434/1619/1125/files/sigamubuvafexurumawode.pdf
    • https://cdn.shopify.com/s/files/1/0449/4072/2331/files/71263109134.pdf
    • https://cdn.shopify.com/s/files/1/0432/8099/0366/files/math_1st_grade_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/90669418604.pdf
    • https://cdn.shopify.com/s/files/1/0445/4537/6420/files/52950048272.pdf
    • https://cdn.shopify.com/s/files/1/0435/5771/6119/files/56677997413.pdf
    • https://cdn.shopify.com/s/files/1/0439/1947/4856/files/49065112245.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a73.bin
7d02eeb8fb6521aea387ecf0860961858d174241fbfed46e9b190ba6d4595305
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A73 4792 bytes
font_01_sfnt_off00008aac.bin
f470722a68846470f53bb1186c0ba703d49595cd5c72902278464ebbfbd96443
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AAC 10380 bytes
font_02_sfnt_off0000ae39.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE39 4324 bytes