Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a56a777450d1829…

MALICIOUS

PDF

39.6 KB Created: 2020-08-31 01:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55ae7cb35921ecb1fac81ce7d9db22ec SHA-1: e57edb7e0853a613b3b0842b313acd493761e669 SHA-256: 2a56a777450d1829138739d4070bb12263d5526dd8a9c1e146e15e41cca23272
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.com/wix?keyword=creme+antibiotica+para+o+orzuelo'. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to a medical topic. The file also contains a PDF link farm heuristic, indicating it's part of a larger effort to distribute malicious links. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link embedded within the PDF.

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=creme+antibiotica+para+o+orzuelo
    • https://static.usrfiles.com/ugd/b8c837_f9041e3a4ecf47f2bb1f5f26774a73c0.pdf
    • https://static.usrfiles.com/ugd/d01287_3744b6cb39244fa8a4e08888db60d6af.pdf
    • https://static.usrfiles.com/ugd/e23fbb_5dc783c1f2244e6f9847dcda55b761f4.pdf
    • https://static.usrfiles.com/ugd/0789d5_8559584d59cf481da244e965a8b0a551.pdf
    • https://cdn.shopify.com/s/files/1/0434/5013/8784/files/sugawelanopoxafugutexako.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21884581804.pdf
    • https://cdn.shopify.com/s/files/1/0430/8788/8551/files/sistema_bethesda_para_informar_citologia_cervical_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/3329/7058/files/34258717007.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd9be588ae804c20a4f678ac1c68a87c.pdf
    • https://static.usrfiles.com/ugd/b4a829_c0385ef8c7b141699726e84a0d72d5cf.pdf
    • https://static.usrfiles.com/ugd/de65f7_ee9fff2f6a9e4d82a5693fe82959fc1d.pdf
    • https://static.usrfiles.com/ugd/b8c837_afbed24747424c868d89aeb25c9ee842.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_off00005e39.bin
cf8b4607224a1e402977cba0c2a43be271625952dad6ede414a43e6be6c8d4e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E39 4996 bytes
font_01_sfnt_off00006f19.bin
0ce5e7c62240b67fa4bc2c2c14514e1e9ec4fd86aaf572773b8499e66f82e903		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F19 10244 bytes

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