Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d0614b30eac24ed…

MALICIOUS

PDF

41.5 KB Created: 2020-08-29 06:38:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a93ec926c54dfdc059d81cfa40ad19a2 SHA-1: fde78f4dac2b81d8b58ef07f27639db87aa933bd SHA-256: 7d0614b30eac24edaa16960a2408c3aeb00e6b5baa43e69d45cae94ff1360f70
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wix?keyword=torrentrover+not+working', which is flagged as malicious. The presence of a "download button" heuristic further supports the lure-based attack pattern. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/wix?keyword=torrentrover+not+working
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_65373540caa0459fa6610c8336131adb.pdf
    • https://static.usrfiles.com/ugd/b8c837_920bd37b31704ac082473788501103f1.pdf
    • https://static.usrfiles.com/ugd/b8c837_8c5bd5cdc0a644668659bed3529a5caf.pdf
    • https://static.usrfiles.com/ugd/b8c837_dbf583947b994d8098a11a478c66a99c.pdf
    • https://static.usrfiles.com/ugd/b8c837_984aba8673e94f28b01643f7eb643778.pdf
    • https://cdn.shopify.com/s/files/1/0432/1922/2687/files/powuxisulakiniza.pdf
    • https://cdn.shopify.com/s/files/1/0435/6286/0699/files/75860879833.pdf
    • https://static.usrfiles.com/ugd/b8c837_5b60b0c50f844d458b006f84c3d5d206.pdf
    • https://static.usrfiles.com/ugd/b8c837_d9c5191d22f84a9d969b58805b3a69d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_4e9895dc3dcf435687dd0be275f704c8.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7daad746264437b8104b43f5a50dc1f.pdf
    • https://static.usrfiles.com/ugd/b8c837_29124ebfb1394f6890e91d97662791a0.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c7ca42a9a1147c2a5e7db55848aa109.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f875d4407444259a3dbeb4d55c5e712.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064bb.bin
5709bd11426e83f2ab6d14a72ef057f00eecf4ed5470e1f2d7cd17533757edc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64BB 4596 bytes
font_01_sfnt_off0000748c.bin
b1999e891dea8a0cdd78c0d6c96ed9678ac805d50659d4b3f8dca2531aac25aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x748C 10804 bytes

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