Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c954ae33e6523fe…

MALICIOUS

PDF

45.5 KB Created: 2020-07-31 10:59:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91fca28dce74c7a89f5108932338f1fa SHA-1: d39247a952bbf0f07c560a98036820b3789ade58 SHA-256: 4c954ae33e6523fef936e87cfae17a81cfbe31ee81589bc773e5dc115ec015e3
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to ttraff.ru. Additionally, it exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify domains. The document body, though heavily obfuscated, appears to contain metadata related to 'wkhtmltopdf' and a title suggesting a topic on the disadvantages of technology in the hospitality industry, likely a lure.

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=disadvantages%20of%20technology%20in%20hospitality%20industry%20pdf
    • http://files.somersetrehab.com/uploads/1/3/1/3/131379236/479ac56cb391.pdf
    • http://files.pacificmotelandrvpark.com/uploads/1/3/1/4/131453194/kejakapif.pdf
    • http://files.newleaforganizingllc.com/uploads/1/3/1/8/131857071/6418065.pdf
    • http://files.thomasstreetpharmacy.com/uploads/1/3/1/6/131637302/piriwovutad.pdf
    • http://files.some
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12729031526.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3902/files/zusajafovopezepim.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/jokapuketepudamedas.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/84166232387.pdf
    • https://cdn.shopify.com/s/files/1/0429/4174/3263/files/25593791085.pdf
    • https://cdn.shopify.com/s/files/1/0429/7401/9740/files/wokiro.pdf
    • https://cdn.shopify.com/s/files/1/0441/2473/3592/files/23857643606.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4493/files/pijezolula.pdf
    • https://cdn.shopify.com/s/files/1/0438/5538/0630/files/42996172209.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/53395102457.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_off000073ab.bin
a2458f414a348435bcc1c07023798cd33dc8628b280840c45a4c631c05c8fb83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73AB 5460 bytes
font_01_sfnt_off0000863d.bin
50d9cf2dd2e2285a0c02edc6a7292a51ac50d68169b035f99783a116a3b3a29c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x863D 9928 bytes

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