Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b081ff2b1711e6…

MALICIOUS

PDF

56.0 KB Created: 2020-08-29 15:17:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29c2bea0bd39c28730ac72b4733b8737 SHA-1: 16bd3f1b4fab2559cdf41172dbd6bff2434e6048 SHA-256: 07b081ff2b1711e694d02f28dcf692917aa286626eb559ee36d15bcd31814165
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically 'ttraff.cc'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to lure the user to a compromised site. The presence of multiple external PDF links further supports a link farm or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=%25E0%25B8%25AD%25E0%25B8%25B0%25E0%25B9%2584%25E0%25B8%25A3+xcv+%25E0%25B8%2599%25E0%25B8%25AB%25E0%25B8%25A1%25E0%25B8%25B2%25E0%25B8%25A2%25E0%25B8%2596%25E0%25B8%25B6%25E0%25B8%2587%25E0%25B9%2583%25E0%25B8%2599%25E0%25B9%2580%25E0%25B8%25A5%25E0%25B8%2582%25E0%25B9%2582%25E0%25B8%25A3%25E0%25B8%25A1%25E0%25B8%25B1%25E0%25B8%2599
    • http://www.opentle.org
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/9146/7176/files/pojeladapemolekevex.pdf
    • https://cdn.shopify.com/s/files/1/0432/9983/1968/files/patakiniwuroj.pdf
    • https://cdn.shopify.com/s/files/1/0431/2717/7380/files/7689444069.pdf
    • https://static.usrfiles.com/ugd/b8c837_b06a2d3d25fc4f509533f5b8e18b48a4.pdf
    • https://static.usrfiles.com/ugd/b8c837_ceefa6617de046cab9af5e0a9b652215.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a7158f5c6cd4e3d8c27d834de300139.pdf
    • https://static.usrfiles.com/ugd/b8c837_a90d8664a6a343a29c12e1403f3a203a.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb3f081d440445e785ead5b9b7aed636.pdf
    • https://cdn.shopify.com/s/files/1/0433/5173/6488/files/general_chemistry_atomic_structure_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/1409/2960/files/mv-_1_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/5139/2922/files/windows_10_unattended_install_answer_file.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7454/files/jofeganofuzuvi.pdf
    • https://cdn.shopify.com/s/files/1/0440/9019/6133/files/software_risk_assessment_example.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/
    • http://www.gnu.org/licenses/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00008095.bin
1003f7479b9fb63a490cb8cc262c838a8886c048558cea5adddde852ec398e62		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8095 16908 bytes
font_00_sfnt_off00005911.bin
72f9f52e6999dc55d2f01a75f8e46cd9dc872fb0a526855f764946e454156dc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5911 4312 bytes
font_01_sfnt_off000067c7.bin
1bd1d2da9b757e53057a7fae72182e596d687b0a27eb54539615cb0c24bfe2ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67C7 9560 bytes
font_03_sfnt_off0000af00.bin
6967ad4b5c7947e1e882648c73e7aa8ab719591fc7eb276e9450f6fea3714257		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF00 9372 bytes

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