Malicious PDF — malware analysis report

Static analysis result for SHA-256 a55c1e81bd0d7e68…

MALICIOUS

PDF

41.0 KB Created: 2020-09-02 00:32:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8ff297a7aca993e313c1534c4eb64b0 SHA-1: 7cd5b69c6f63a4e69abe6e98a570441642e8f619 SHA-256: a55c1e81bd0d7e6864a7e146a57ce670385b3398eba0c5796d915bc27c3bef04
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure at 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to 'videohive templates free', suggesting a lure to entice clicks. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the malicious nature of the redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.cc/wix?keyword=videohive+templates+free
    • https://static.usrfiles.com/ugd/16a96a_cc9892d28de04127976f0f20e4ba6ea3.pdf
    • https://static.usrfiles.com/ugd/f55bec_fb0add64ce8c45e4a524d3df64be12f7.pdf
    • https://static.usrfiles.com/ugd/74a852_8be822cd3be54561b2b87ab07051371a.pdf
    • https://static.usrfiles.com/ugd/f35da0_992a780c8845447181dcd9d43234deda.pdf
    • https://static.usrfiles.com/ugd/909b15_63201b082205497cb9266d6632916b2c.pdf
    • https://static.usrfiles.com/ugd/7c1f05_66eb2eafab354079aec3d6dee53b8818.pdf
    • https://static.usrfiles.com/ugd/9e41f0_468c2b2a0ea542399a586193fc753950.pdf
    • https://static.usrfiles.com/ugd/cc03df_c2380bb6a4ad43799358171dbbd50b5b.pdf
    • https://static.usrfiles.com/ugd/0b46e6_5d4b5e502443450ebc9adbba9968164d.pdf
    • https://static.usrfiles.com/ugd/7ef0dc_b228a05a8dae401eb1a8a6e60343702d.pdf
    • https://static.usrfiles.com/ugd/432b07_db803203185c479585003144bfa3bc2c.pdf
    • https://static.usrfiles.com/ugd/9ea9b6_4b828601c5784d63b253338cb606b7b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_c59f01c313944bd89b6c6d5c60b9c983.pdf
    • https://cdn.shopify.com/s/files/1/0428/7699/3702/files/11874255758.pdf
    • https://cdn.shopify.com/s/files/1/0431/1135/0439/files/gratitude_guided_meditation_script.pdf
    • https://cdn.shopify.com/s/files/1/0435/0499/2408/files/smokey_robinson_cruisin.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_off000062c5.bin
842ebaad6cabd138e2f43026c55ef49c11b45dee609c0d11f3c55c23a4ca35c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x62C5 5308 bytes
font_01_sfnt_off000074ae.bin
7dc8c4567ac8eb93a224b3aff00bce05ff80f9e7ab50d6c49b284fc3faf5f332
pdf-font-stream PDF embedded font (sfnt) at offset 0x74AE 10164 bytes