Malicious PDF — malware analysis report

Static analysis result for SHA-256 46c18bb09e8176d2…

MALICIOUS

PDF

46.1 KB Created: 2020-08-31 01:24:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4718219b7d3fceed65c62e5dd20e791e SHA-1: 8983ed01e250f3ea2859f7ca4d1b8e812017862f SHA-256: 46c18bb09e8176d2d82f713396ea0f0031bd8df735524a5fa5802ffcb0302212
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its structure containing a large number of external links, a technique often used in SEO link farms to manipulate search engine rankings or distribute malicious content. One of the embedded URLs, 'https://ttraff.ru/wix?keyword=bajaj+chetak+parts', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, reinforcing its malicious intent.

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.ru/wix?keyword=bajaj+chetak+parts
    • https://static.usrfiles.com/ugd/06497e_d2885af85ff94c97b6019f2b122983cb.pdf
    • https://static.usrfiles.com/ugd/b8c837_6aa831ffa1ee41eca5ec82483d40b280.pdf
    • https://static.usrfiles.com/ugd/a4e402_9f0f78c159584c47a8185d81a1f9f3a2.pdf
    • https://static.usrfiles.com/ugd/b4f0c6_a295f4dd8fa544aeb08dbb2cd4eb6ec8.pdf
    • https://static.usrfiles.com/ugd/d1c05f_a08715ddbdba4879a329dcb826857d05.pdf
    • https://static.usrfiles.com/ugd/b8c837_ae1a318ed707480780e7c1d766f775bb.pdf
    • https://static.usrfiles.com/ugd/cc14e4_a2d852ad61cb4329b961fbb93a93d79a.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d2de1530d9a40f7a8d9d9c9c6652491.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a498d95f1c549b0a84515fce544a631.pdf
    • https://static.usrfiles.com/ugd/6c98bc_56bbecf0ebfb406083a0eefd7458821c.pdf
    • https://static.usrfiles.com/ugd/b8c837_4275fff636264bcd9c8b473c06ad75c9.pdf
    • https://static.usrfiles.com/ugd/c20ea7_cf66bd2b36e44ede9cfd10fa4df01bec.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_off00006a41.bin
5a998b8107bbb8b615277e151f705c623603e899d1411a58ccbf072eec56daa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A41 5180 bytes
font_01_sfnt_off00007bd7.bin
64009d99e0a8f24cfbda5f4819a12ab6eb1ef1dfc95fbd09ababe7798ad49b56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD7 15912 bytes

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