Malicious PDF — malware analysis report

Static analysis result for SHA-256 882fd5a2caef3dd7…

MALICIOUS

PDF

51.5 KB Created: 2020-08-30 21:24:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8db5eb7a8d13f03a0bee967decb98c9 SHA-1: 05eedc7b352d50654d7edf7704c33bdad78956ce SHA-256: 882fd5a2caef3dd7e6f662708faea4c5d492b62b638ddf15a94c35c193049224
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wix?keyword=trabajo+new+york'. The document body, though heavily obfuscated, also contains this URL, suggesting it's a lure for job seekers. The presence of numerous external PDF links further indicates a link farm or redirection strategy. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

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.ru/wix?keyword=trabajo+new+york
    • https://static.usrfiles.com/ugd/4c1554_2889e933f4a24e3087be6b32f363cd6e.pdf
    • https://static.usrfiles.com/ugd/fb5067_4379e74fe574439aa72e15001cead68b.pdf
    • https://static.usrfiles.com/ugd/b8c837_2ca350049c0a4c17966172f1d586d236.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d1585b03d2447ef80abc8ce87e08c31.pdf
    • https://cdn.shopify.com/s/files/1/0431/0247/0306/files/cockatrice_rs3_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/8872/3616/files/zuposoxegafaloduzexi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1825/files/32979835195.pdf
    • https://cdn.shopify.com/s/files/1/0441/0910/3256/files/vehicle_sale_agreement_form_in_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0433/1274/2555/files/varuposomiw.pdf
    • https://cdn.shopify.com/s/files/1/0464/6145/2440/files/speech_writing_format_for_class_11.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/furinefavafeb.pdf
    • https://cdn.shopify.com/s/files/1/0428/0126/6851/files/kadambari_free_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075ba.bin
18a9965ce9c95e4b79b792f5e639f0d127ff4599332855124534e4d293416ae5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75BA 4892 bytes
font_01_sfnt_off0000868a.bin
2d99b9aed1b9f2534385e35111256bc5b0d2283c334a23436a50d3deac4293b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x868A 6072 bytes
font_02_sfnt_off00009c6f.bin
46c149d2f3ee1adabfc459caa8c385d951be8adfed9f82040a6836392f783144		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C6F 10700 bytes

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