Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b70db43b2e9732…

MALICIOUS

PDF

55.2 KB Created: 2020-09-01 18:28:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2911bb79650f60805f77b2a2cf1c87c3 SHA-1: 413c1ce3ccfb6fa39a0dd60f70eb3315c99e6d2e SHA-256: f0b70db43b2e9732b5a144f59ba082947883759d84aafb082bcbd2aa5303f300
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=ventajas+de+los+aditivos+alimentarios+pdf'. This URL is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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.club/wix?keyword=ventajas+de+los+aditivos+alimentarios+pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mulobovapu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3246/8890/files/zisulipevamipi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5361/2182/files/pezemidovigififo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/gosaruraralapowuvoferedo.pdf
    • https://static.usrfiles.com/ugd/b8c837_b6516d8ffd5c4fc8942484cde4ea3668.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea145b9d95fa4104aaa97b7668ab9385.pdf
    • https://cdn.shopify.com/s/files/1/0435/6289/3471/files/16509933703.pdf
    • https://cdn.shopify.com/s/files/1/0430/8510/3255/files/83653434722.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_off00009728.bin
1ec03443fa3c561afb85d44b3976d8e7798aee79aa6c64e4abbc40d98dfc402c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9728 5288 bytes
font_01_sfnt_off0000a91d.bin
b1950fcf19020427898828043ee9c2be6682c4b9ba31ca44490875d955fe79df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA91D 11564 bytes

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