Malicious PDF — malware analysis report

Static analysis result for SHA-256 40c9e9e70b95593c…

MALICIOUS

PDF

36.2 KB Created: 2020-08-31 00:32:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7579287ffe9e84bcebd14275223e9100 SHA-1: 4681198b9a0d5153b42d487890eba6f8c7016dc5 SHA-256: 40c9e9e70b95593c990f56df5518efeac256816b88d82e4df96b92c693d54ab8
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to 'static.usrfiles.com'. The document body, though heavily obfuscated, contains the same malicious URL. The primary attack vector appears to be social engineering through a deceptive link.

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.com/wix?keyword=ironclad+kong+original+knuckle+impact+resistant+gloves
    • https://static.usrfiles.com/ugd/cc14e4_ac91c9c4f20a4f718204d5c563e87ca3.pdf
    • https://static.usrfiles.com/ugd/36f25b_b83fec26f1424ca2bd71d045eddb41b8.pdf
    • https://static.usrfiles.com/ugd/fef806_381d9cd4530040aeacc96c3b1fc600d4.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/rafagedetosixuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/4053/7750/files/85814726328.pdf
    • https://static.usrfiles.com/ugd/b8c837_ebfe44e4ad984da08e15a64926d64bb2.pdf
    • https://static.usrfiles.com/ugd/9ea91e_60f24bc0fc694cc59844ee4d6da11e98.pdf
    • https://static.usrfiles.com/ugd/429b25_14a590844266467b8960aaff92e2bb07.pdf
    • https://cdn.shopify.com/s/files/1/0451/0390/6969/files/newegutupekinote.pdf
    • https://cdn.shopify.com/s/files/1/0430/8339/9321/files/38870954512.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_off00004be6.bin
df5f86c95d77694386ce512da827fc992d29be1cc06b5be566bc2a30730dfcf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BE6 5452 bytes
font_01_sfnt_off00005e59.bin
6b3593728bce7718f8dcc2abd810e460b7635d943a36400972db22a9ea41373c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E59 10596 bytes

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