Malicious PDF — malware analysis report

Static analysis result for SHA-256 c82f608cddc72e9c…

MALICIOUS

PDF

63.9 KB Created: 2020-08-03 03:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 732abf36197ad3a0551a1f267023993e SHA-1: 175359d7eb614d9c80d821be724090741f539728 SHA-256: c82f608cddc72e9cea94c68c49865c8102b72419bb8f08ecfddf72bff004ac49
128 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of these URLs, 'https://ttraff.ru/pify?keyword=uss+nimitz+arma+3', is flagged as a malicious redirector. The presence of a visual download button lure further supports the malicious intent. The document body, though heavily obfuscated, also contains these URLs, reinforcing the attack pattern.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=uss+nimitz+arma+3
    • http://files.ccanorth.org/uploads/1/3/1/4/131438190/8be1b423dc9f52.pdf
    • http://files.faithbaptistky.org/uploads/1/3/2/3/132302963/95dbaa90cbb8b2b.pdf
    • http://kefamus.stockbridgeseatco.co.uk/uploads/1/3/2/7/132741029/9cf561.pdf
    • https://cdn.shopify.com/s/files/1/0431/4116/9309/files/vesexidigutabugawidifema.pdf
    • https://cdn.shopify.com/s/files/1/0434/5239/9773/files/180961047.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bewewolifokolugetu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5396/4712/files/wubowuwurixoroxed.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/nijunorerilobebufi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1555/files/joxitomisoxureze.pdf
    • https://cdn.shopify.com/s/files/1/0434/3860/4450/files/nojoserir.pdf
    • https://cdn.shopify.com/s/files/1/0432/4550/2626/files/vipigufupipugujuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/6609/6802/files/m9k_shipments_code.pdf
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/mack_truck_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/7014/4166/files/32077436574.pdf
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/96056787715.pdf
    • https://cdn.shopify.com/s/files/1/0434/7097/9238/files/xutidumizepowazojez.pdf
    • https://cdn.shopify.com/s/files/1/0430/7081/6407/files/bibulixuxuxupozovubemax.pdf
    • http://steamcommunity.com/sharedfiles/filedetails/?id=201087083
    • 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_off0000b0bf.bin
e7660b84e7aa793f34cf610217b6a8b8f265cc1a70ebd04eb99de553ffa84040
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0BF 5004 bytes
font_01_sfnt_off0000c1b7.bin
70755ee4c9c66c2184bedbddd77d0a559dc0b773b68777e92033a0f68a507d5f
pdf-font-stream PDF embedded font (sfnt) at offset 0xC1B7 15648 bytes