Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac5f0798962dd19a…

MALICIOUS

PDF

37.2 KB Created: 2020-08-31 18:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5eb7ff2ae7681d65cda96a0ed6b8ef67 SHA-1: 6137aa4795117670cc0498dce90c3ab07c20506e SHA-256: ac5f0798962dd19a03ed3eb4dd5e34564f12d32b8f2bc6b0d9535c89cb530f14
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=net+framework+4.+5.+2++64+bit'. This URL, combined with the document body's mention of 'Net framework 4.5.2 64 bit', suggests a social engineering lure to trick users into downloading malware. The file also exhibits characteristics of a link farm, with numerous external PDF links, indicating a potential attempt to distribute malicious content or manipulate search engine results.

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/wix?keyword=net+framework+4.+5.+2++64+bit
    • https://static.usrfiles.com/ugd/3d0627_6f62aaa931f443208ec9e7ca5db9df83.pdf
    • https://static.usrfiles.com/ugd/227d0f_f71883f079b348ac848efaceb8e07d12.pdf
    • https://static.usrfiles.com/ugd/93c935_4ba3c513a1444fc783c228472aa8ceca.pdf
    • https://static.usrfiles.com/ugd/83e24f_ac449d34fc024d9f873475ae952b963c.pdf
    • https://static.usrfiles.com/ugd/e3c460_14aa35eda30746138402c713a9ee49ae.pdf
    • https://cdn.shopify.com/s/files/1/0432/7286/3904/files/rifts_world_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/1037/5325/files/32804216674.pdf
    • https://cdn.shopify.com/s/files/1/0430/0252/7897/files/lanotelidubupagubaxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6542/6598/files/how_to_edit_files_online_and_save_it_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/0964/4456/files/camille_saint_saens_biography.pdf
    • https://cdn.shopify.com/s/files/1/0428/0903/2863/files/sovunowuneneposajavigi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5056/4773/files/sakidow.pdf
    • https://static.usrfiles.com/ugd/b8c837_a86d91661e1c4b0799e907e1ff31fb36.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b7033b76afb4be58cc8b6af50ca52f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_5281e1bfd0ea43fa8091cbaade2a9dbc.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_off0000534e.bin
0b371aa79606381913c1a0322738606eed5bb60b49d8b5020cdd9b012df122ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x534E 5500 bytes
font_01_sfnt_off0000661d.bin
ef9494206774c08c964a7d2f82010ffebd1c9bb9bf21af040cb5a0481158c04c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x661D 9712 bytes

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