Malicious PDF — malware analysis report

Static analysis result for SHA-256 36b1d11411d3d270…

MALICIOUS

PDF

42.4 KB Created: 2020-09-02 02:12:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5c3584c316d6b3454b40a3004f26d9b SHA-1: 5cc41d78cacea3c3aaa5b716e51741cce6e0473b SHA-256: 36b1d11411d3d2701259ab381b5fcecd26801d70e08aa921994206cee278a77c
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.ru. This URL is presented within the document body, disguised as a guide for 'Civilization IV Beyond the Sword'. The file also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The primary malicious URL is the most significant IOC.

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.ru/pify?keyword=civilization+iv+beyond+the+sword+guide
    • https://cdn.shopify.com/s/files/1/0432/2240/1185/files/soxirozozamejojosidijile.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/75320426607.pdf
    • https://cdn.shopify.com/s/files/1/0446/7235/2419/files/partial_differential_equations_strauss.pdf
    • https://cdn.shopify.com/s/files/1/0437/0684/3288/files/kovukopototaruvazajumus.pdf
    • https://cdn.shopify.com/s/files/1/0430/4545/3985/files/dedudorolojire.pdf
    • https://cdn.shopify.com/s/files/1/0429/9679/3503/files/fitbit_charge_3_operating_manual.pdf
    • https://cdn.shopify.com/s/files/1/0449/4046/0200/files/assamese_book_file_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/5106/4228/files/kuxiwuwekikezolunozutug.pdf
    • https://static.usrfiles.com/ugd/b65acf_803b4bf4a14e4a008f1b62df83aee5e6.pdf
    • https://static.usrfiles.com/ugd/275374_db94981a93c54ac9a8562d7a9aa68537.pdf
    • https://static.usrfiles.com/ugd/843280_5da9d409f76e4742b7022a9b03f13d53.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_c92971bd06b642d99162f7bbf06365e0.pdf
    • https://static.usrfiles.com/ugd/e3c460_739e26c2dc474292b1da8089a6ee6faa.pdf
    • https://static.usrfiles.com/ugd/b8c837_74ae297ff93b4b328d2d254a0eeb62d5.pdf
    • https://static.usrfiles.com/ugd/7198c1_d15b7528cf9142a8969a211359db3072.pdf
    • https://static.usrfiles.com/ugd/f3cb45_fb40525fdd41453b9628979074194e3f.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_off00006641.bin
9a81dc0901518e07b74abb41f8b32b72e9a8ac6fafb8c396cd79c0a715df7124		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6641 5436 bytes
font_01_sfnt_off000078d0.bin
cff9d666ceaf57e29d906bba0c416c98ef56484b62ba3d82de1ab65a2afa7131		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78D0 10472 bytes

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