Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f29c79aa5b7f5c7…

MALICIOUS

PDF

46.5 KB Created: 2020-08-28 21:38:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec67742c83d88caf7fa2827cb3642226 SHA-1: 0d98ab6ae9fbc52619178a66dd160595d58f7546 SHA-256: 3f29c79aa5b7f5c71d87eb29976fa802a8cad2edc214aa05c9162d827589b6ee
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL https://ttraff.com/wix?keyword=public+relations+strategies+pdf is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site. The document body, though heavily obfuscated, contains this URL, reinforcing its role in the attack. The file's purpose appears to be social engineering, masquerading as a document about public relations strategies to entice users to click the malicious link.

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.com/wix?keyword=public+relations+strategies+pdf
    • https://static.usrfiles.com/ugd/b8c837_c73295986d444f3382ac896738b636b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_019096de12f24e95a47cbc0fdde67012.pdf
    • https://static.usrfiles.com/ugd/b8c837_b19ae811a6e5425888552086771aff93.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c30d21a8b8c4586b5e78b68638c2b08.pdf
    • https://static.usrfiles.com/ugd/b8c837_f861ee5715104bb1bcc7f9945812e132.pdf
    • https://cdn.shopify.com/s/files/1/0432/9370/4356/files/v20_ready_made_characters.pdf
    • https://cdn.shopify.com/s/files/1/0448/1161/6418/files/wismec_predator_228_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/ap_set_question_paper_2020.pdf
    • https://static.usrfiles.com/ugd/b8c837_29e7b3aade4a4eb8bb125d60c744419c.pdf
    • https://static.usrfiles.com/ugd/b8c837_9624d14830c74476a1917027b3de8b7f.pdf
    • https://static.usrfiles.com/ugd/b8c837_f454b93d6fad41bc85e70e7b7c8c3dd3.pdf
    • https://static.usrfiles.com/ugd/b8c837_259b529153ee4d06878348b75a9551b3.pdf
    • https://static.usrfiles.com/ugd/b8c837_5b86ac5d3a4c43088823d502d87f9643.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006829.bin
71887dc3a93bc4f59cd0ffa99f7e10cabad0685e2a5dbbfb79bff689246e9d69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6829 5344 bytes
font_01_sfnt_off00007a4e.bin
f615f8ca88cea15be48671b3400327c418e31c27db0ae522fbb0c6a2d85eb733		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A4E 10860 bytes
font_02_sfnt_off00009f39.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F39 4324 bytes

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