Malicious PDF — malware analysis report

Static analysis result for SHA-256 63df3e62a5acb915…

MALICIOUS

PDF

40.1 KB Created: 2020-08-29 13:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 985dcb2494d56cba262540925682001e SHA-1: 8854ca1d734a0478b27b81a6d4dbc892c9efc294 SHA-256: 63df3e62a5acb9154afb13edbfa23903058afe8cd56ebb53409c9cb5755146f5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The document also features a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.cc/wix?keyword=bleach+all+colour+but+the+black+engl
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/6593/3985/files/latoya_francois_sentencing.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/59626021976.pdf
    • https://cdn.shopify.com/s/files/1/0436/3635/9326/files/sipinipisiwulibub.pdf
    • https://cdn.shopify.com/s/files/1/0427/8140/9436/files/xepof.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/barebuneranitipujedab.pdf
    • https://cdn.shopify.com/s/files/1/0432/4173/4301/files/xiwelozuferabologifame.pdf
    • https://cdn.shopify.com/s/files/1/0433/5969/9109/files/bafexif.pdf
    • https://cdn.shopify.com/s/files/1/0434/6403/2422/files/98750559750.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/genetically_modified_plants.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051f3.bin
fe12fd76f652abba1cbcefcb59916f5307e0dfe85815074f9bef3092cba0bbe2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51F3 4972 bytes
font_01_sfnt_off000062cf.bin
13549c42fbce2e82b150b26555f92fa0670050ea3611aec6b810cd7c2516cbef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62CF 10180 bytes
font_02_sfnt_off000085a0.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85A0 4324 bytes

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