Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfb4d62f0377198f…

MALICIOUS

PDF

38.6 KB Created: 2020-08-18 20:20:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be654871927d750bf604f44896b4eda7 SHA-1: 7afa1b649c0132b78d9f65738ef01107455ad250 SHA-256: dfb4d62f0377198f3690ce4fcf5ce98f3296c4d26f3465e1c282cc7c1d5138a0
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is further supported by the document body containing the same URL. This URL is designed to lure users into downloading cracked software, likely as a pretext for malware delivery. The PDF also contains a link farm heuristic, indicating a broader SEO-based distribution strategy.

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=winrar+64bit+win+10+full+crack
    • http://files.thomas.rentals/uploads/1/3/1/8/131856065/8882619.pdf
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/poopyhead_game_rules.pdf
    • https://cdn.shopify.com/s/files/1/0440/6863/4789/files/authorizations_in_sap_software_design_and_configuration.pdf
    • https://cdn.shopify.com/s/files/1/0437/4419/8805/files/alberta_township_map.pdf
    • https://cdn.shopify.com/s/files/1/0436/4229/0336/files/transistor_cross_reference_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/6232/0536/files/alkalise_or_die.pdf
    • https://cdn.shopify.com/s/files/1/0433/7195/4334/files/64599137464.pdf
    • https://cdn.shopify.com/s/files/1/0438/8365/9419/files/puwekazavofufawupawobogud.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9862/files/mepabumakaxek.pdf
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/official_sat_study_guide_2016_edition.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_off0000574e.bin
582eebfb158f17c007d2f3fce4465c675b095e53d662f343c22d91f67d41b448		 pdf-font-stream PDF embedded font (sfnt) at offset 0x574E 5444 bytes
font_01_sfnt_off000069ff.bin
60623b4fe1c39654dacf43e7d8e4580f1eb466324229bad1b170707f06767bef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69FF 10660 bytes

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