Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a4c3137e8b6105e…

MALICIOUS

PDF

47.2 KB Created: 2020-08-18 13:41:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a7d755a71f03127232141269c8e29bf SHA-1: 8c517af3fa5e6a60f3c46335cbe1fb3ca8790f4c SHA-256: 8a4c3137e8b6105e873006146475340737fbc77bee0e2ead9ba9ac8df898eabc
160 Risk Score

Malware Insights

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

The PDF document contains a link farm and a direct link to a known malicious redirector. The document body text, though heavily obfuscated, contains the string 'Counter strike 1. 6 warzone hack free' and the malicious URL, suggesting a lure for users interested in obtaining unauthorized software. The presence of a password archive lure heuristic indicates that this PDF is likely part of a multi-stage attack where the actual payload is encrypted and delivered separately.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=counter+strike+1.+6+warzone+hack++free
    • http://files.yardandgardenserviceshamilton.ca/uploads/1/3/0/9/130969370/komumuzilozozevajulu.pdf
    • http://wiboxa.duncanranchwhitetails.com/uploads/1/3/1/8/131856380/womidututob-dukinudeduzu-zejukiwiledejad-fijemadumunag.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/negezimosob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77439678162.pdf
    • https://cdn.shopify.com/s/files/1/0430/5272/8474/files/sufifuvapoxitusuxezis.pdf
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/27626181701.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/wugijazuvakuvolo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/aloha_soft_sheet_set.pdf
    • https://cdn.shopify.com/s/files/1/0432/6211/6008/files/fuxix.pdf
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/ludefexirotoriri.pdf
    • https://cdn.shopify.com/s/files/1/0431/2956/9434/files/latest_technology_in_computer_science_2020.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/82048279575.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2802/files/8877150112.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/41169403867.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_off00007596.bin
a1422caf02c6ef2964421090ab0ac3a062f00c875f2d77068b925cbfaf5d8a0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7596 5284 bytes
font_01_sfnt_off000087b3.bin
64c6bf3e0689437208c9d15e80f5fcd3484a41ee1c5df786107fccce4029f65d
pdf-font-stream PDF embedded font (sfnt) at offset 0x87B3 12456 bytes