Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fa08714f02275b5…

MALICIOUS

PDF

66.5 KB Created: 2020-09-04 12:37:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee53b0aae5ff74a280a3a1dca8342381 SHA-1: d06d766642e313b0be6258dc5919fdbe265f02a9 SHA-256: 7fa08714f02275b56fd466542e24fbe8d1a88792e07a1f6cac8a0c390f2bc9ce
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a link to a free movie. This indicates a social engineering lure to drive traffic to malicious infrastructure. The ML classifier strongly supports the malicious verdict. While no scripts were extracted, the presence of the malicious URL and the PDF structure suggest a delivery mechanism for further compromise.

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.ru/wix?keyword=north+by+northwest+free+movie
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/active_learning_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0439/4021/6987/files/27074040111.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/acknowledgement_for_college_project.pdf
    • https://cdn.shopify.com/s/files/1/0429/3692/6374/files/8706222665.pdf
    • https://cdn.shopify.com/s/files/1/0431/9268/0611/files/online_50th_birthday_invitation_templates.pdf
    • https://cdn.shopify.com/s/files/1/0431/4726/4166/files/66655367752.pdf
    • https://static.usrfiles.com/ugd/97634b_b0a820e73a5c49a8b9f5dfb8a1dfb40e.pdf
    • https://static.usrfiles.com/ugd/c34aa9_877d5a144c9443109b7dc6008a7ef89b.pdf
    • https://static.usrfiles.com/ugd/834936_6dfab20e77334b2b82edcd6fe8a8f865.pdf
    • https://static.usrfiles.com/ugd/d8e941_5fa2a1f181a64493a41bc5f9ad823544.pdf
    • https://static.usrfiles.com/ugd/be19e1_f138f50cc0724ffe9206377dbe82bd76.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f68eb444f0f46489efea14ce3ee0019.pdf
    • https://static.usrfiles.com/ugd/b4609a_cd89f425109448019f7fb6b6aee8081a.pdf
    • https://static.usrfiles.com/ugd/e3ff21_be33936d156f488585742cfd9b6d60b7.pdf
    • https://static.usrfiles.com/ugd/e00bd3_c77430a1e3304ed2989a7af7ddd20b79.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_off0000c6f7.bin
93b1b040b9c1292cf8901c75ff991a646f01e1fc27a5791ada241aec8cf1ab38
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F7 5128 bytes
font_01_sfnt_off0000d865.bin
3e46d6dfd7e95bc8ded26e36ea0b17e8674537e33d381cd9e29fb7ac2c15323c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD865 10660 bytes