Malicious PDF — malware analysis report

Static analysis result for SHA-256 357e69260260768e…

MALICIOUS

PDF

55.5 KB Created: 2020-09-06 09:24:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96b471083b506f2ca4eab75516ee8575 SHA-1: 33d1c7713034cba0237283453de8dde6ecadd329 SHA-256: 357e69260260768eb004bc9a9729cb270f2d426e0b49f4bbf69145163952a5a0
150 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector infrastructure, specifically `https://ttraff.me/pify?keyword=canciones+infantiles+pdf+piano`. This URL is presented in a context that mimics a search result, aiming to trick users into clicking it. The file also exhibits characteristics of a link farm, with numerous external PDF links, many of which point to benign content but are likely used to obscure the malicious redirector. No scripts were extracted from this sample.

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.me/pify?keyword=canciones+infantiles+pdf+piano
    • https://static.usrfiles.com/ugd/4e6dd5_3fdc518b80ac4f0f8b10afd2938f71bb.pdf
    • https://static.usrfiles.com/ugd/122077_885fa234d29c40ebaef927c3b7c63fa6.pdf
    • https://static.usrfiles.com/ugd/312e0e_caa3fefa0cad4f069fe29e115c208c9e.pdf
    • https://static.usrfiles.com/ugd/8c0e65_194086cacb01406ab8b77be4f61d0f7f.pdf
    • https://static.usrfiles.com/ugd/02ccf7_eddc0168c9de4333a0fff248d1837b9e.pdf
    • https://cdn.shopify.com/s/files/1/0431/6951/3632/files/advantages_of_cathode_ray_oscilloscope.pdf
    • https://cdn.shopify.com/s/files/1/0437/6713/6413/files/45517827762.pdf
    • https://cdn.shopify.com/s/files/1/0430/8333/3786/files/bosapobope.pdf
    • https://cdn.shopify.com/s/files/1/0431/1118/6585/files/street_fighter_2_getjar.pdf
    • https://cdn.shopify.com/s/files/1/0464/3140/4184/files/isunshare_password_genius_free_full_version.pdf
    • https://cdn.shopify.com/s/files/1/0439/0384/4520/files/risk_assessment_template_for_events.pdf
    • https://cdn.shopify.com/s/files/1/0439/0571/2296/files/22692912784.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006297.bin
2d2c43d366ae60e4c4f2be4f088f5b0abf7826455a575ae635c6cb1ad63722f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6297 4864 bytes
font_01_sfnt_off00007329.bin
f18cb7c19b5f4fd4221a6204b33e04bc2383c0d793680b6d483add5fd89cec11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7329 2532 bytes
font_02_sfnt_off00007e3b.bin
43bd5d540dad26c8590da9fda0773143175f962502a0062b8bbd85bdf2f51b24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E3B 14532 bytes
font_03_sfnt_off0000ab92.bin
6930e85765fe54c7284fb813f9ad1b96dccd3dca583ff0edd884e471556f5a32		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB92 16860 bytes
font_04_sfnt_off0000c257.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC257 4324 bytes

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