Malicious PDF — malware analysis report

Static analysis result for SHA-256 de005935c88ab7e1…

MALICIOUS

PDF

41.5 KB Created: 2020-08-12 08:59:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71b912e7c2901f3172d74f264f73eade SHA-1: a9a35a80ee48f8b7d20e1e7067d9c5a59f86a416 SHA-256: de005935c88ab7e137104d641a61c4e747a3bfc065e007d5316237145033b715
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to a redirector service known to host malicious content. The primary lure appears to be a search result for 'centroid and moment of inertia solved problems pdf', which redirects through 'ttraff.cc' to a potentially malicious PDF. The document body itself is heavily obfuscated but contains the same lure URL. The presence of numerous links to Shopify domains, some confirmed benign, suggests an attempt to blend in with legitimate content while directing users to malicious sites.

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.cc/pify?keyword=centroid+and+moment+of+inertia+solved+problems+pdf
    • http://files.cobaltcounselor.com/uploads/1/3/1/3/131382223/rojejamawezudewaki.pdf
    • http://files.msgeekyteach.com/uploads/1/3/0/9/130969754/8039491.pdf
    • http://pitevi.openmindimprov.com/uploads/1/3/1/6/131636725/5772125.pdf
    • http://files.radarstrongjones.com/uploads/1/3/0/7/130775308/xamepo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0745/1042/files/budegasuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/4672/2965/files/fokosoxoxadew.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0225/files/compaia_botanica_libro_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0429/5252/3929/files/gololemaxukakowalejugikul.pdf
    • https://cdn.shopify.com/s/files/1/0430/8225/2442/files/69066111615.pdf
    • https://cdn.shopify.com/s/files/1/0446/3912/5667/files/nobody_casting_crowns_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0432/2312/2084/files/zugagikimovamofavexur.pdf
    • https://cdn.shopify.com/s/files/1/0431/7242/9980/files/kikidasazi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5808/6559/files/8631632010.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3110/files/95786809151.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_off00006577.bin
cceaee2ce55eae6619f28482eed436c8cdf6b9b56ff8a1915c565e27884d2f4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6577 5292 bytes
font_01_sfnt_off0000775c.bin
65e52528665078875e0584549726a0ccc467a5fa0d0613d07cb6d33ab5247984		 pdf-font-stream PDF embedded font (sfnt) at offset 0x775C 9904 bytes

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