Malicious PDF — malware analysis report

Static analysis result for SHA-256 38dc952457435a81…

MALICIOUS

PDF

52.9 KB Created: 2020-09-02 03:28:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d515b0e7febf3e517dc1d493b995cc8 SHA-1: 66526f56c51271d4526bedf58a60516006f1364f SHA-256: 38dc952457435a81989e352e96a5bba6f063309ddccc66ceb65c853cf61703c5
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing for PDF_SEO_LINK_FARM indicating a link farm. The primary malicious URL, https://ttraff.cc/wix?keyword=odia+dj+audio+songs, is identified as a redirector. The document body, though heavily obfuscated, contains references to this malicious URL and numerous benign-looking PDF links hosted on Shopify, suggesting a tactic to manipulate search engine results and lure users to malicious content.

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.cc/wix?keyword=odia+dj+audio+songs
    • https://cdn.shopify.com/s/files/1/0430/7245/4810/files/61636339916.pdf
    • https://cdn.shopify.com/s/files/1/0439/9369/4366/files/nedafijaputiwuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/4855/9004/files/rorezufinekoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/3971/1655/files/50777787178.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/bacteriologia_y_virologia_veterinaria_merchant_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xumilegimazuguvabunozanik.pdf
    • https://cdn.shopify.com/s/files/1/0430/6848/9881/files/vugaxurexuviwefu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8052/3678/files/rikunudukugerabezalif.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/besaxewokafad.pdf
    • https://cdn.shopify.com/s/files/1/0428/8384/2215/files/github_windows_command_line.pdf
    • https://static.usrfiles.com/ugd/71fd01_8009dd1982da4187a9a98701e1a8631c.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5275f14275f4be9b28eedb7b2fde6de.pdf
    • https://static.usrfiles.com/ugd/1be480_002f2cb2ee4645d1897b8e7562586501.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_f30af58106c34b77acaadb3469519d85.pdf
    • https://static.usrfiles.com/ugd/b7082a_8a77a59089c64559a879d39ec6a23e4b.pdf
    • https://static.usrfiles.com/ugd/6e3131_d30bd8747893462ca8c764a5ef7ecd68.pdf
    • https://static.usrfiles.com/ugd/c7a620_8d1a4659eb864d3ba9a0a2e50f3d9dec.pdf
    • https://static.usrfiles.com/ugd/90c678_a3e1b50597c34c7d901df181fb5d2c61.pdf
    • https://static.usrfiles.com/ugd/70a38d_ec3726fb90cf48cf994e21bf97c74966.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/
    • https://static.usrfiles.com/ugd/b7082a_8a77a59089c64559a8

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006835.bin
996f285dab0c4a09499b690b736ae8d34d4aa6ff3205a069a70c8cb861f6d0d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6835 4968 bytes
font_01_sfnt_off00007926.bin
46646cc872e5c02286a66c23a5dca246200c5b0d4a8bc157813fa7109ec5890b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7926 5240 bytes
font_02_sfnt_off00008bfb.bin
121bc72419e6356f9fabb039260c72ba6258edcee0d69a1dcc5d03dea1d15753		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BFB 10688 bytes
font_03_sfnt_off0000b0d1.bin
4761e3c36aff6ebd845830fc223bb7ac3274a1680e3ce0a977e62f44202c527a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0D1 16088 bytes

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