Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c06439dbcb1e4c3…

MALICIOUS

PDF

38.9 KB Created: 2020-08-25 20:24:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a38ff443d1eee9e163f78ef5cd14867 SHA-1: 57817772c0ce42f196e37454dfbff6126e21edd1 SHA-256: 4c06439dbcb1e4c3e3a0c6787324a618a28d58ea6094381d33d6000127cd2b55
120 Risk Score

Malware Insights

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

The PDF file contains a link farm and a malicious redirector. The primary malicious URL, https://ttraff.com/pify?keyword=ingenious+mechanisms+for+designers+and+inventors+volume+4, is designed to lure users into clicking by appearing to offer a technical document. This redirector likely leads to a malicious payload download or a phishing page. The presence of numerous other PDF links suggests a link-farming or SEO poisoning tactic to increase visibility and traffic to malicious sites.

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/pify?keyword=ingenious+mechanisms+for+designers+and+inventors+volume+4
    • http://files.kitchen-519.com/uploads/1/3/1/4/131438692/2942167.pdf
    • http://nuvefa.bouttechristian.org/uploads/1/3/1/3/131383791/ae432f.pdf
    • http://files.cafedatalkalamode.com/uploads/1/3/1/4/131483550/3bbbf7.pdf
    • http://files.cantonohiolandscaping.com/uploads/1/3/1/4/131453651/453c43f3.pdf
    • https://cdn.shopify.com/s/files/1/0436/6077/1481/files/catia_v5_sheet_metal_tutorial_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/7322/3321/files/37419879206.pdf
    • https://cdn.shopify.com/s/files/1/0433/4275/8053/files/wifaweribow.pdf
    • https://cdn.shopify.com/s/files/1/0437/5071/9642/files/17414156990.pdf
    • https://cdn.shopify.com/s/files/1/0430/8123/6634/files/68071770065.pdf
    • https://cdn.shopify.com/s/files/1/0434/2412/0997/files/94635388445.pdf
    • https://cdn.shopify.com/s/files/1/0435/8835/4207/files/21814083571.pdf
    • https://cdn.shopify.com/s/files/1/0435/4713/2068/files/cambridge_pet_tests.pdf
    • https://cdn.shopify.com/s/files/1/0457/4422/6460/files/audiomack_free_music_er.pdf
    • https://cdn.shopify.com/s/files/1/0430/7386/3842/files/essential_thrombocytosis.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_off00005a01.bin
d7bcee66d321d1d1793e5c967e6a9d2d6efdb6e770b1dc9b42590e6dd56b93d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A01 5520 bytes
font_01_sfnt_off00006ca3.bin
f70886a2286f258713d01a5b3a6138abda477a29aa59c4055b7bf53467ccfa19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA3 10016 bytes

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