Malicious PDF — malware analysis report

Static analysis result for SHA-256 34fb4b09b2e5a8e0…

MALICIOUS

PDF

39.2 KB Created: 2020-08-30 01:43:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b898b04a63e872bb08a28e5d10c8b34 SHA-1: 50cb3ea1eb9d4741ac1d042dc41cdf23ec3253cc SHA-256: 34fb4b09b2e5a8e0a8083763a5aa1b7cf4e5eee012e6c618d09837368268b1d9
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=operations+with+exponents+math-+aids.+com+answers'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious URL is sufficient to infer a phishing or redirection attack pattern.

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.ru/wix?keyword=operations+with+exponents+math-+aids.+com+answers
    • https://cdn.shopify.com/s/files/1/0439/1757/4299/files/1602808742.pdf
    • https://cdn.shopify.com/s/files/1/0432/1837/0728/files/vuribipagukowo.pdf
    • https://cdn.shopify.com/s/files/1/0441/2253/8136/files/kiwifruit_the_genus_actinidia.pdf
    • https://cdn.shopify.com/s/files/1/0437/6159/8616/files/98376146600.pdf
    • https://static.usrfiles.com/ugd/b8c837_1505b55887c0471ea6653e924c00a7b1.pdf
    • https://static.usrfiles.com/ugd/f0e51d_44c20db9806e4c91a8318e46d5e4dfc6.pdf
    • https://static.usrfiles.com/ugd/9b5f63_8d5d32ec84f442bb844b2d7e4c670155.pdf
    • https://static.usrfiles.com/ugd/07625c_b8f07b4c76654ea2a129ef3984ce898a.pdf
    • https://static.usrfiles.com/ugd/63d3ad_f1e4db7ccdfa4d749da9c69d5942940e.pdf
    • https://static.usrfiles.com/ugd/9e41f0_24bc9e64f06b49eea96a707f8e161aef.pdf
    • https://static.usrfiles.com/ugd/63022f_366d9509979747a681e0166fe2b02961.pdf
    • https://static.usrfiles.com/ugd/de02f3_846de093c053478590f15a7b2f685c38.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_off00005cb1.bin
f4948cbe9fb2d11057c10cf7fb1fe932e2af574b224500da1140f1288d030b4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB1 5532 bytes
font_01_sfnt_off00006f66.bin
6b5e05a27a5f02da802722441f6cafa9ae537345ed4a30e49e0f8ae023529d6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F66 9516 bytes

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