Malicious PDF — malware analysis report

Static analysis result for SHA-256 727a2e8d621c7873…

MALICIOUS

PDF

43.2 KB Created: 2020-08-31 14:59:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0725c9d4e04e28d044c1705e2f672585 SHA-1: ce2e4602a4d2cdeb1c6d6d030e51ead91eaf86b3 SHA-256: 727a2e8d621c78738f257e9e077c5975e8f1e2742caf8fd0293d23aeb7b0fda9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous embedded links, a common tactic for SEO link farms and phishing. The primary malicious link, 'https://ttraff.ru/wix?keyword=cdev+stock+performance', is identified as a redirector to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it's designed to lead users to harmful content.

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=cdev+stock+performance
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/a4d998_ac96158ce3ac466d9154c724ec61a7c1.pdf
    • https://static.usrfiles.com/ugd/c1615c_c959243455dc4809ab5dcb15942e3e8f.pdf
    • https://static.usrfiles.com/ugd/fb5067_4dc5600025f1491e973a4771b051d6f3.pdf
    • https://static.usrfiles.com/ugd/e2f197_0b871475af354b55a5323dceaa6a1fa3.pdf
    • https://static.usrfiles.com/ugd/b11f6d_96864b32a2e04039b70cad57b8185932.pdf
    • https://cdn.shopify.com/s/files/1/0437/3469/6097/files/36497965068.pdf
    • https://cdn.shopify.com/s/files/1/0432/0899/9072/files/damage_report_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9649/0655/files/carpenters_sing_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0434/6917/6985/files/xexivipedipo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/43650165575.pdf
    • https://static.usrfiles.com/ugd/599f1c_ec6ca97f1fa74fc8ae5f7184860149fe.pdf
    • https://static.usrfiles.com/ugd/e73fea_6f74f01d0fda40b9afd49c0e4170063a.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5b4b82739394ef4bb6a35ed2618f455.pdf
    • https://static.usrfiles.com/ugd/87a178_10864fe4e96d44148722122ca4759b33.pdf
    • https://static.usrfiles.com/ugd/3be3a7_a57458db0f284f7892603d45feab1f37.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c9c.bin
1971233f955bab3314f0b60779195d0431720753b1601f00cdff851bbe95cd86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C9C 5156 bytes
font_01_sfnt_off00006e15.bin
273e64b51765407885b852fbdf1f5e044160ae8037b2d10f12cabb871fd83968		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E15 10548 bytes
font_02_sfnt_off00009201.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9201 4324 bytes

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