Malicious PDF — malware analysis report

Static analysis result for SHA-256 8019c5d3a32f171a…

MALICIOUS

PDF

49.0 KB Created: 2020-07-23 16:59:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 626c3b71b941a921a26186d21b3a05ff SHA-1: 8837adca1facc88109d7ff8a9daf1af58b6b3234 SHA-256: 8019c5d3a32f171ad8b3c747aa5caad1607843efe1f96fbe0d3bb623d9901426
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous external links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains references to 'Belden 3106a pdf' and 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The presence of multiple Shopify-hosted PDF links further indicates a link farm strategy.

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/wb?keyword=belden%203106a%20pdf
    • http://files.redneckfest.org/uploads/1/3/1/8/131855992/3967369.pdf
    • http://files.glaston-bury.com/uploads/1/3/1/4/131437878/wirubab.pdf
    • http://files.kikwetujournal.com/uploads/1/3/2/7/132712214/jevotigumozunadokasa.pdf
    • http://files.ballfamilyqt.com/uploads/1/3/1/4/131454505/ae6fa8423088159.pdf
    • http://files.radovansebesta.com/uploads/1/3/2/6/132695679/jaxawerifef_vidapi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8360/3873/files/linalimobanajoxuwuvarevon.pdf
    • https://cdn.shopify.com/s/files/1/0433/1424/9886/files/dovibijafem.pdf
    • https://cdn.shopify.com/s/files/1/0429/0704/1958/files/rafizajakavorivonodogob.pdf
    • https://cdn.shopify.com/s/files/1/0428/8118/8003/files/fulurogozebiru.pdf
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/60538998211.pdf
    • https://cdn.shopify.com/s/files/1/0435/6590/8136/files/63054751655.pdf
    • https://cdn.shopify.com/s/files/1/0431/4575/6821/files/46721606636.pdf
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/68653321298.pdf
    • https://cdn.shopify.com/s/files/1/0428/9386/9223/files/29260779961.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9477/files/tajekar.pdf
    • https://cdn.shopify.com/s/files/1/0431/2029/6090/files/86459238376.pdf
    • https://cdn.shopify.com/s/files/1/0434/3293/5574/files/29519132692.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13534048661.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gabagijujusudizal.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/
    • https://cdn.shopify.com/s/files/1/0428/8118/8003/files/fuluro

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075ed.bin
f3230191c41c6027c0653572b250ad9423022800f856485a26dd03b436260e42
pdf-font-stream PDF embedded font (sfnt) at offset 0x75ED 4872 bytes
font_01_sfnt_off0000867f.bin
b37838567c2ee4b472fd11b6b75b1b48ad696a7b5cb2722015ae8e569448c5ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x867F 14960 bytes