Malicious PDF — malware analysis report

Static analysis result for SHA-256 d68076f9e079842d…

MALICIOUS

PDF

50.8 KB Created: 2020-08-30 02:06:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6445b87cfd5af8cfd9d219434d3075d1 SHA-1: 6487812bd75b4e8f7940d1b3217039961df38ccf SHA-256: d68076f9e079842df4d5338c1216c2df3b3c65fc602afc82bba42ff3f43cf4dd
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a link that redirects to a malicious domain, masquerading as a game guide. This is supported by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The document body, though heavily obfuscated, contains the lure text 'Crysis 3 wiki guide' and the malicious URL. The presence of numerous links to external PDFs, many hosted on Shopify and static.usrfiles.com, suggests a link farm designed to improve search engine ranking for malicious content.

Heuristics 3

  • 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.
  • 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=crysis+3+wiki+guide
    • https://cdn.shopify.com/s/files/1/0429/7578/9215/files/dpia_cnil_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/sutixixamegu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9101/8396/files/faroselodev.pdf
    • https://cdn.shopify.com/s/files/1/0430/9375/4009/files/piromupupovowuwixixani.pdf
    • https://static.usrfiles.com/ugd/b8c837_e0ac459034d44cfb887ca47771c862cd.pdf
    • https://static.usrfiles.com/ugd/a6e5e9_9ddf8ebeb37140a58318bf42ca7d1f51.pdf
    • https://static.usrfiles.com/ugd/b8c837_623562211cd74c198580d61541629065.pdf
    • https://static.usrfiles.com/ugd/3f80ec_8741f2692a2f41d8a2fe75ac4ee2b1bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a08c401915e4bd18991ef63afac1668.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f42116102f64ca3866508ef0553202b.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb9c164d9f764af6adca72799d9bd272.pdf
    • https://static.usrfiles.com/ugd/b7ed05_ac6f3b4861a3444baf45660c883f69f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_aee1749d4d0c47098118cd85d555da8a.pdf
    • https://static.usrfiles.com/ugd/05900a_4aa2657a08364f5ca0530a5a81e12dca.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_off00008200.bin
341a1c0174302a7efcf3012457ba6f1a749ea9f4fda31e87d9e0ea1b836c56f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8200 5076 bytes
font_01_sfnt_off0000936c.bin
128f966b19dded912aabaaa76799e7f7c0b1579cfb3b6d09ef1d5152d0f7e142		 pdf-font-stream PDF embedded font (sfnt) at offset 0x936C 13732 bytes

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