Malicious PDF — malware analysis report

Static analysis result for SHA-256 a23d79034108fd9c…

MALICIOUS

PDF

43.2 KB Created: 2020-09-08 06:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7aea9a2f02786c2cc6d1ee7c349d9863 SHA-1: 490a9e01b603ec3e2d6892f01b34cb55e8790fc4 SHA-256: a23d79034108fd9cc327d5402fd0a5a0c154c898b703da6da2f99487c1cfcfcc
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=sort+worksheets+alphabetically'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with 'https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mowojemabedeju.pdf' being the first identified. The document body, though heavily obfuscated, contains these URLs, suggesting a social engineering attempt to redirect users to malicious infrastructure.

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.me/wix?keyword=sort+worksheets+alphabetically
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mowojemabedeju.pdf
    • https://cdn.shopify.com/s/files/1/0432/4425/7442/files/jatupusiva.pdf
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/counter_strike_1._6_free_cs_warzone.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/zujofalojuzorelinadugut.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16946396068.pdf
    • https://static.usrfiles.com/ugd/1e4819_e33cd9b36221492ab00871ec7e58b141.pdf
    • https://static.usrfiles.com/ugd/b8c837_de59b9b9172143acbfdfeff1c89cfc96.pdf
    • https://static.usrfiles.com/ugd/9cc572_dec1543966544144b85ea72608e5ce1e.pdf
    • https://static.usrfiles.com/ugd/07ef24_3695e370d05b468188985de277aed682.pdf
    • https://static.usrfiles.com/ugd/11276f_265afb4928494e7789be294a0b106ff5.pdf
    • https://static.usrfiles.com/ugd/04c368_bb174c111a8c4e229e91ad7cf660e655.pdf
    • https://static.usrfiles.com/ugd/2072cd_bf17e8c9ebb54a60b1f1024c16806191.pdf
    • https://static.usrfiles.com/ugd/b4609a_e6ff38e35e8d4b3582e680900d82e2c6.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_99cf4333b8f54117b4d95fdab2ffb83e.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_off00006a14.bin
e195f406a992a2f0c7301c87db4c963d915f7e09cfa89ebc0747e5eb4624d8c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A14 5520 bytes
font_01_sfnt_off00007ce7.bin
026bf1f51e21167c171f493b3aa9e5c524ebce89aa87d9dfdf2afd38f29f2b82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE7 10388 bytes

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