Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c333647c37b1a5…

MALICIOUS

PDF

40.3 KB Created: 2020-08-25 23:03:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f9a4b9749ba697af7b906a855e6c348 SHA-1: 505ae6c60e65e13ddf41fa47b959dcba0d4de6ce SHA-256: 32c333647c37b1a582129d44725854c6ba22214c04909db78ee0dd6321f4dd20
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=jitem+i+ben+kurdum'. This suggests the document is designed to lure users to a potentially harmful website. The presence of numerous other PDF links, many hosted on cdn.shopify.com, indicates a link farm strategy, likely for SEO poisoning or to obscure the final malicious destination. No scripts were extracted, and the document body is heavily obfuscated, but the primary malicious intent is clear from the redirector URL.

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/pify?keyword=jitem+i+ben+kurdum
    • http://files.nicolettelynch.com/uploads/1/3/1/3/131379743/5030429.pdf
    • http://files.junkremovalvegas.com/uploads/1/3/1/3/131381804/zotik_sapelomarir_juvoge.pdf
    • https://cdn.shopify.com/s/files/1/0433/0379/6894/files/sowolokisogitowev.pdf
    • https://cdn.shopify.com/s/files/1/0431/1180/9190/files/berserk_opening_2016.pdf
    • https://cdn.shopify.com/s/files/1/0435/3038/7605/files/wojamamur.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bovegutug.pdf
    • https://cdn.shopify.com/s/files/1/0437/8987/7405/files/90937371500.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zipepatijexozuzazes.pdf
    • https://cdn.shopify.com/s/files/1/0429/2670/2758/files/movefipuzagupu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/letter_tracing_books.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_off00005f3d.bin
1aaf68c048819198bbb05cc08c04c70d42003c9642462603b6c18e3594ed69b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3D 4744 bytes
font_01_sfnt_off00006f46.bin
9d92318881d9c93ca7fa04e22c698e5a3c4d0ba6a890e367074e764c954e4524		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F46 11620 bytes

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