Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ae23357d7e50aba…

MALICIOUS

PDF

39.3 KB Created: 2020-09-07 01:44:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cfacd9ebbcb11fa42126057c3c709b8 SHA-1: 671d4f09936d0cddfb96da18983c6ca40f3fae3c SHA-256: 8ae23357d7e50abacb3bf94f4ed80c3858dd9cd426e00e5ae79a3e3fa518929b
150 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a link farm hosted on static.usrfiles.com. One of the primary links, traff.club, is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Ramadan greeting email template' and the malicious URL, suggesting a social engineering lure to drive traffic to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.club/wix?keyword=ramadan+greeting+email+template
    • https://static.usrfiles.com/ugd/e2c223_cdbbd5c440d2458d943c0acfbf557660.pdf
    • https://static.usrfiles.com/ugd/32acb1_7b551e88bd904600843c800dc6c69416.pdf
    • https://static.usrfiles.com/ugd/6fd45c_573050cb3cf4444e96b4747901f0fcb3.pdf
    • https://static.usrfiles.com/ugd/b47706_2266bdfae13c41c7a82873225845375e.pdf
    • https://static.usrfiles.com/ugd/120f26_e496770d8c8d44b08184c58448e49da7.pdf
    • https://static.usrfiles.com/ugd/696b8a_11c45ee7a15249149109fb065fd7a0cc.pdf
    • https://static.usrfiles.com/ugd/a3b54b_0bc98f57c6174b71b9bb6affc851e862.pdf
    • https://static.usrfiles.com/ugd/b8c837_7492fa46f0884664b73071ecbe1ce725.pdf
    • https://static.usrfiles.com/ugd/d6af85_4a5a3ffca60f4b22b64a1da1d18fbfc3.pdf
    • https://static.usrfiles.com/ugd/b8c837_86b54a4779884ccc938a13b2a93799e8.pdf
    • https://static.usrfiles.com/ugd/d31907_f36fe2c881bd40f29e8d314e2278f448.pdf
    • https://static.usrfiles.com/ugd/e2f197_77d0e03c401641e5914705071514fcbb.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0d3364034134d359eb31f41ffd4f906.pdf
    • https://static.usrfiles.com/ugd/41a0b6_6c2055ef1e374d6c9f56d866e162cbc5.pdf
    • https://static.usrfiles.com/ugd/158fb9_fee6e092c151410db9bca6fe0ad8867f.pdf
    • https://static.usrfiles.com/ugd/565485_d933fe4139b34fc694148227e96ba444.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_off00005aca.bin
4ea3f3f61cfd8cc963576c2e48e3d065a214876347bcfd3b8e2864fa497b8555		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ACA 5108 bytes
font_01_sfnt_off00006c14.bin
1bff20c2d6aeaeeb888ac62c77d03531d59b30f2c410ad2b84614b6602557f90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C14 10688 bytes

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