Malicious PDF — malware analysis report

Static analysis result for SHA-256 20bd8cd387466c35…

MALICIOUS

PDF

42.4 KB Created: 2020-08-10 19:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87c21029cd2f29bcce7f4ec2036c23ac SHA-1: f217d22b886fcf19181f2e78edd240441a634a72 SHA-256: 20bd8cd387466c35cad4b44df127eec4ee8ca755949488329d981bf9ffa700c2
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though partially corrupted, contains text related to 'pictures starting with letter a to z pdf' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

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/pify?keyword=pictures+starting+with+letter+a+to+z+pdf
    • http://kasuxorev.soulblisshealingcentre.com/uploads/1/3/1/6/131606490/a669afcd28.pdf
    • http://lokekegox.pilsefestchicago.com/uploads/1/3/2/3/132302872/warimixevo.pdf
    • http://bibalo.mayfieldwomensclubofwc.org/uploads/1/3/1/6/131637814/7287984.pdf
    • https://cdn.shopify.com/s/files/1/0431/5319/5162/files/7885576811.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8106/files/gawakatoxogelarogaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/3206/8775/files/83757015424.pdf
    • https://cdn.shopify.com/s/files/1/0430/8615/1833/files/free_online_converter_to_excel_2020.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/17161018274.pdf
    • https://cdn.shopify.com/s/files/1/0436/7260/0726/files/bootstrap_3_offset.pdf
    • https://cdn.shopify.com/s/files/1/0433/0831/8878/files/nejexew.pdf
    • https://cdn.shopify.com/s/files/1/0437/6756/2394/files/complete_sentences_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dekafarisajanitid.pdf
    • https://cdn.shopify.com/s/files/1/0429/2725/9811/files/19363567307.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9142282406.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_off00006804.bin
ce241f204a01992c32b3fcbbc11460453f9f0abf15d63b440ac9c79f81dae140		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6804 5560 bytes
font_01_sfnt_off00007afc.bin
7ce2f93e880d1186badf8ac8319b35d0432f10205aa3ba6e2663bec5ba23ae54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFC 9936 bytes

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