Malicious PDF — malware analysis report

Static analysis result for SHA-256 01b553031e1d07af…

MALICIOUS

PDF

61.8 KB Created: 2020-08-29 23:43:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 864a37d3c3032bb820c421289f2fe8fc SHA-1: 7610789f3193bd2cd5f2af70ebfe28ca15600a6a SHA-256: 01b553031e1d07af172cfe622cd10bc148fd3f72c8ac138465e07df4ad09afdb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links, with one critical heuristic firing indicating a redirector to a known malicious domain, ttraff.com. The document body, though heavily obfuscated, contains the URL and keywords suggesting a lure. The presence of numerous external PDF links further supports a link farm or redirection strategy. The ML classifier strongly indicates maliciousness.

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=cloud+atlas+read+online
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_791fd0c048c3440aaea525b831fe53db.pdf
    • https://static.usrfiles.com/ugd/b8c837_c29ae1bceaaa479c8e4ea670a18e14fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_c3432394b27c49f6849e96a7c898cee8.pdf
    • https://static.usrfiles.com/ugd/b8c837_bd99668bcb474cd1811b69bb9332fe57.pdf
    • https://static.usrfiles.com/ugd/b8c837_95984a5f735046ce9fcdf2916bf839b3.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f20a658b6594a728d1e632be534843f.pdf
    • https://static.usrfiles.com/ugd/b8c837_754389c3fe49474483e0c5960eceea09.pdf
    • https://static.usrfiles.com/ugd/b8c837_397a65b8f8294e299470d6a375cbeb53.pdf
    • https://static.usrfiles.com/ugd/166c09_2d6cb695cbb44be699c74b22e5054ff8.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad930f9d705b458d8c3e80af9d8e9ac8.pdf
    • https://static.usrfiles.com/ugd/b8c837_f9e422887b9849548831af4a72104d98.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e81fd44c89242d781c1bddc7448a2a8.pdf
    • https://cdn.shopify.com/s/files/1/0432/2348/2530/files/xurujivonapibiv.pdf
    • https://cdn.shopify.com/s/files/1/0439/5050/6152/files/a_room_of_one_s_own_full.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/doragewotupepefe.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b55a.bin
bec0c8ee1cdf2d175719981b3a471c52ede5f5f1f4512ea8720a32531fc11632
pdf-font-stream PDF embedded font (sfnt) at offset 0xB55A 4724 bytes
font_01_sfnt_off0000c56d.bin
ac7612a758dc5a186a4fea02e61cf65e9c7267ad533c030db54ae5026b3c1ba9
pdf-font-stream PDF embedded font (sfnt) at offset 0xC56D 11376 bytes