Malicious PDF — malware analysis report

Static analysis result for SHA-256 54afac05cdd761b7…

MALICIOUS

PDF

36.0 KB Created: 2020-08-30 05:47:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32078bf18ea1a70cfeaeabe66af276a2 SHA-1: 414dd933d1f2d38d3eb03ea71d08c0c878be71ef SHA-256: 54afac05cdd761b737bd0491abc2166abd0b0ec48e09347fa297ec30f15c0610
152 Risk Score

Malware Insights

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

The PDF file contains a prominent link that appears to be a download for "Jon Bellion The Human Condition". This link, however, redirects to a known malicious domain (ttraff.ru), indicating a phishing or malware distribution attempt. The presence of numerous other links pointing to static.usrfiles.com suggests a link farm designed to obscure the malicious redirector. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a social engineering lure.

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=jon+bellion+the+human+condition+download+zip
    • https://static.usrfiles.com/ugd/64d889_ce4951cdc70d40afb418aa0993dbc1c1.pdf
    • https://static.usrfiles.com/ugd/fd30ac_fc05a206d7a84d239c2708cc3ffce3fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_99629299280b4f74b9c96dbba9db3d3d.pdf
    • https://static.usrfiles.com/ugd/b47706_1a0f2902bf2d4cb08297b810ac27695c.pdf
    • https://static.usrfiles.com/ugd/b8c837_233d63fd43384f64a6583dfb153e8502.pdf
    • https://static.usrfiles.com/ugd/cec570_a20927fc61ca49fbb77719a6240c88f8.pdf
    • https://static.usrfiles.com/ugd/739437_4469016218fd40d587b1e0b7db7d1042.pdf
    • https://static.usrfiles.com/ugd/40512e_ba934a5cfb884c6089f866c23998deec.pdf
    • https://static.usrfiles.com/ugd/b8c837_e36b7e4a920346da937485d9921a63db.pdf
    • https://static.usrfiles.com/ugd/9904c2_a01099fc7a704d918afc8d2cc794302a.pdf
    • https://static.usrfiles.com/ugd/b8c837_42d41e60342244e4b845ba07bfca318e.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef49ec6bf39c4bb486bb80f5e5d64998.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4ad87bbb5ac45b1b7a6d1efa8027d16.pdf
    • https://static.usrfiles.com/ugd/b8c837_237d3ab74ea845c88c79e92779e2444f.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc26ae7fa3284b06949b93269be5a247.pdf
    • https://static.usrfiles.com/ugd/ade4e6_1571ccb22a724f9897b159130e899b9c.pdf
    • https://static.usrfiles.com/ugd/2f8cea_305f4d2b70654677aedc5e11c9aa4cd9.pdf
    • https://static.usrfiles.com/ugd/9904c2_91d07673ea15495e8be879e819b31365.pdf
    • https://static.usrfiles.com/ugd/83b1b3_d9baa240e27e434a96d01f0ab022a9c9.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_off00004dbf.bin
0f3743fac1417fa85d384e337a33d122e5fe6f1e111ec0dcacc7e583500e81ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DBF 5312 bytes
font_01_sfnt_off00005fb8.bin
d43c191a17c6e738ca94377d3c92c93dbcccd7630b448e285f36c2772070d30b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB8 10308 bytes

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