Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ed442c74632a422…

MALICIOUS

PDF

38.9 KB Created: 2020-09-18 20:10:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 548f5a303e7b3c83ee31234c38be7fa8 SHA-1: a3970eb79a8e8b4a0dc31e97f1edd1d9ca61ce94 SHA-256: 4ed442c74632a422c2b0a3fa81e98a88c1e63666aca291c0a9aff779e5c15810
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, disguised with a seemingly innocuous keyword. The PDF also contains a large number of external links, many of which point to domains that appear to be part of a link farm. The document body contains obfuscated text and URLs, suggesting an attempt to hide the malicious intent. The primary attack vector appears to be social engineering through a deceptive link.

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.club/wix?keyword=amy+tan+mother+tongue+analysis+essay
    • http://pefutosu.heelsdowntackandapparel.com/uploads/1/3/2/7/132710712/2014399.pdf
    • http://files.gehringerwines.ca/uploads/1/3/2/3/132303245/3141720.pdf
    • http://files.sarahconnatser.com/uploads/1/3/2/6/132682745/tavusokenapoxix.pdf
    • http://files.garydmcguganbooks.com/uploads/1/3/2/6/132681356/wisubuzajonilizoted.pdf
    • http://lapeka.bruceburrartist.com/uploads/1/3/2/8/132815732/9836206.pdf
    • https://d7920947-a8b0-46b7-992b-787664918d11.filesusr.com/ugd/e2c223_cc9efc7d2fdc4a41b63eb7a68495dce8.pdf?index=true
    • https://dc479643-43e8-4a34-8091-38ad33fa4826.filesusr.com/ugd/ff68bb_9d0376d82c8f40a3913029f4488f3840.pdf?index=true
    • https://63dd84f5-a5b4-44c7-8660-7760e76f4660.filesusr.com/ugd/cf9ff1_18eaa12c3c0843ff9eb6533404ea7b46.pdf?index=true
    • https://a73d0357-269c-4dfa-8bd5-9888a8dd3a87.filesusr.com/ugd/d7ba0f_0b8e839edc614343b789866a36540a33.pdf?index=true
    • https://ac74fb38-3dfe-4f5b-9444-80123a29c3c1.filesusr.com/ugd/9421c8_3aabcf1179aa4fb180c4ec797e8ddc5e.pdf?index=true
    • https://d1e87323-aa67-468d-ba5d-422dde8f0c53.filesusr.com/ugd/db80c5_3a155e4315dc436697106251142ac43c.pdf?index=true
    • 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_off00005c46.bin
0f643da30fd2e2f3bf76101a2a9cf374ec05b54807c0f1334afde6b6615398b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C46 5192 bytes
font_01_sfnt_off00006dcb.bin
3fbf512678751037c25dffb219e33c9e27b26fc1ecc0dc55b5e006a83f484525		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCB 9692 bytes

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