Malicious PDF — malware analysis report

Static analysis result for SHA-256 78279bd0a36648f1…

MALICIOUS

PDF

39.4 KB Created: 2020-09-11 07:39:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2628030a9f3137eb888a0f12e5104c8 SHA-1: 936c14697bfc8aec89ac8a779c02ec0501baaa13 SHA-256: 78279bd0a36648f1ae163acf31411f19a6a9ce23d528e38bb4586ea152cf2b4e
160 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one leading to a known malicious redirector. The 'SE_CLICKFIX' heuristic indicates the document likely instructs the user to manually execute a command, a common tactic to bypass macro security. The primary malicious URL identified is https://ttraff.me/wix?keyword=gmod+workshop++stuck, which is likely used for further payload delivery.

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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.me/wix?keyword=gmod+workshop++stuck
    • https://static.usrfiles.com/ugd/17beed_15551c165b8b4f74b9782c4c64c76741.pdf
    • https://static.usrfiles.com/ugd/6924eb_ec18b263b1ad403a9acdb25173eb95d7.pdf
    • https://static.usrfiles.com/ugd/f96b02_c356a7b4f63a46829932beb552dedd3a.pdf
    • https://static.usrfiles.com/ugd/c88839_cf4b505d9e1945ffacfcc4ad6881ecc6.pdf
    • https://static.usrfiles.com/ugd/fe83c3_ca9c47f37ab048f8ab42be12015ee240.pdf
    • https://static.usrfiles.com/ugd/824332_666aa6fc401f48909ee30806993e7d71.pdf
    • https://static.usrfiles.com/ugd/20d83a_354568050a884d10bb526f12b6497969.pdf
    • https://static.usrfiles.com/ugd/be19e1_86470005a2a94af9ba0a6fd65227e8cc.pdf
    • https://static.usrfiles.com/ugd/67f5f7_2f574ac9c4c5427f8036815619442d96.pdf
    • https://static.usrfiles.com/ugd/136d3d_2045a57cc21648e58b9f9fca5165c304.pdf
    • https://static.usrfiles.com/ugd/18574e_3eb42fbdece941e0991603b4e2ba5679.pdf
    • https://static.usrfiles.com/ugd/3b7182_df1d464bb481430c82fc965df217acd6.pdf
    • https://static.usrfiles.com/ugd/b91566_e65d8baa04e84a2493be53ea4c7f1922.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_off00005d8a.bin
5f42a5de7f02172eb295335cb93812a65ab4f947100cc41bc92a4f941eca4744		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8A 5256 bytes
font_01_sfnt_off00006f5e.bin
629d6d92f7c231b4061418d8d43dd29bad7b86dde6f2bee6b1472eda6add57f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5E 9948 bytes

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