Malicious PDF — malware analysis report

Static analysis result for SHA-256 7012b4ef40feffe4…

MALICIOUS

PDF

45.3 KB Created: 2020-08-31 07:01:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81537a00ba2df7c63101b789b9c39fac SHA-1: 773a9f00933c18f4568de546dd65468a0405b9ae SHA-256: 7012b4ef40feffe46c3e3962f0f676619ffea2906f989fdc47d6c23d4acf5585
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to game downloads and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a password-protected archive lure heuristic indicates an attempt to bypass security controls.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=counter+strike+1.5+cfg+indir+gezginl
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/e3ed1f_193af53c51f449efb52c5ffa228cd5ef.pdf
    • https://static.usrfiles.com/ugd/b8c837_f638475c55ef479c915449acb3f40f13.pdf
    • https://static.usrfiles.com/ugd/b8c837_660b14e04af94f5cbbb47d4e424fedcc.pdf
    • https://cdn.shopify.com/s/files/1/0429/5832/3865/files/39228891361.pdf
    • https://cdn.shopify.com/s/files/1/0428/3033/2060/files/85541975432.pdf
    • https://static.usrfiles.com/ugd/b8c837_531afa0bf6e04d9a977a40609040b82a.pdf
    • https://static.usrfiles.com/ugd/6f9b04_35113633988d4ae0baae4b5124e464f7.pdf
    • https://static.usrfiles.com/ugd/4725f1_ed8f62507d544921acff19c779d4d3ae.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_a33f13d813834062a0860cb52c4ee68a.pdf
    • https://static.usrfiles.com/ugd/09273f_47d62454c5a647a4a869418712725451.pdf
    • https://cdn.shopify.com/s/files/1/0428/2223/8374/files/lasifalapikepunetelaxakug.pdf
    • https://cdn.shopify.com/s/files/1/0437/1644/4315/files/daxotowagisisotemotivize.pdf
    • https://cdn.shopify.com/s/files/1/0431/8334/1728/files/46198974923.pdf
    • https://cdn.shopify.com/s/files/1/0432/6565/4946/files/sevorejotuwa.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_off000072aa.bin
eabb751798bd3f560c1e55dd42618c7a9cf46cbee37db802bf24b89e6bd2d4c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72AA 5204 bytes
font_01_sfnt_off00008486.bin
de0ec350b9bc1cd07558f86fc79b9fe519ca0d2557a66cda39164bfea5565eb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8486 10412 bytes

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