Malicious PDF — malware analysis report

Static analysis result for SHA-256 476ff3e4778dba76…

MALICIOUS

PDF

32.7 KB Created: 2020-08-24 09:49:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be187de135023e3c5f055fe814cc35b0 SHA-1: 58d1b2fa38eee44763fef3432448d2c151c76254 SHA-256: 476ff3e4778dba76bc887b4f79d61e007fe77267e6a80302429fdd4ba8eb3429
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.com', which is flagged as malicious. It also exhibits characteristics of a PDF link farm, with numerous links to other PDFs, likely for SEO manipulation or to obscure the malicious destination. The document body, though heavily corrupted, contains the malicious URL and appears to be a lure related to 'annette larkins recipes pdf'. No scripts were extracted, but the primary attack vector is the embedded malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=annette+larkins+recipes+pdf
    • http://sokowu.bcild.org/uploads/1/3/1/4/131483167/doxotagaxis-basubuzojukiru-daguso-dawumo.pdf
    • https://cdn.shopify.com/s/files/1/0436/6660/4182/files/nakama_1.pdf
    • https://cdn.shopify.com/s/files/1/0432/4674/7803/files/paxojixusigalifax.pdf
    • https://cdn.shopify.com/s/files/1/0443/0092/7132/files/rofawinujarixusajul.pdf
    • https://cdn.shopify.com/s/files/1/0434/0059/3557/files/karezuzepove.pdf
    • https://cdn.shopify.com/s/files/1/0439/4962/1406/files/difixevafifafag.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zutazalurofesavasa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0564/8801/files/informational_report_investigating_a_career_path.pdf
    • https://cdn.shopify.com/s/files/1/0438/0711/3373/files/borland_c_builder_6_developer_s_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/0197/0837/files/ganax.pdf
    • https://cdn.shopify.com/s/files/1/0434/6249/2324/files/exercice_etre_et_avoir_au_futur.pdf
    • https://cdn.shopify.com/s/files/1/0435/6925/0463/files/basara_temple_information_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/4780083199.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_off000043bc.bin
411403005e8820ba536f04af22a6fee377fc3617df7295dc04b044067c210fad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43BC 5200 bytes
font_01_sfnt_off00005573.bin
5be33f11067e0ee4c91f1b67ce9c6cf75874d8fe3d12d2095a48b1ed76da1b72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5573 9612 bytes

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