Malicious PDF — malware analysis report

Static analysis result for SHA-256 7628f788c6bcc203…

MALICIOUS

PDF

38.0 KB Created: 2020-08-19 16:39:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d756b9b66e760db9b129c9ce9ed04fff SHA-1: 0d54c4c0b6fc930e72f4eee64bff168a77a0e259 SHA-256: 7628f788c6bcc203f19f63e1a9eaecff756bc588b43a3f319d9f846334e3b0cd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to external PDF files, a technique often used for SEO manipulation or to host malicious content. One critical heuristic identified a link to known malicious redirector infrastructure. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to direct users to potentially harmful content, likely as part of a phishing or scam campaign.

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/pify?keyword=angel+eyes+raghav+free
    • http://files.hoolahoopgreetings.com/uploads/1/3/0/7/130775633/a8c5b0689d.pdf
    • http://files.counsellingsupport.co.nz/uploads/1/3/1/3/131398188/dezuxavenutow.pdf
    • http://files.vickeldarby.com/uploads/1/3/2/7/132710704/d709fb.pdf
    • http://files.theredpillrenegade.com/uploads/1/3/0/8/130874026/renuwip-ronosikugi-wireseni-bevefafu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5735/6710/files/canales_ionicos_tipos.pdf
    • https://cdn.shopify.com/s/files/1/0431/9939/8052/files/56774386235.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lozafawofife.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/magibenabisex.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/separate_pages_into_one.pdf
    • https://cdn.shopify.com/s/files/1/0430/0714/8185/files/12977487864.pdf
    • https://cdn.shopify.com/s/files/1/0428/7243/8947/files/17867727204.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9645/files/roxololelo.pdf
    • https://cdn.shopify.com/s/files/1/0452/0817/4743/files/99236814013.pdf
    • https://cdn.shopify.com/s/files/1/0448/2108/6365/files/mozabu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6237/0210/files/witejawiwunuganisopo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/libro_periodontologia_clinica_carranza_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0432/8115/4204/files/zerejakadegeporum.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004edc.bin
b2c55dc4698f783b8e1194c68ec499998dd25ff34099f896b535826129e8a210		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EDC 5180 bytes
font_01_sfnt_off00006083.bin
be4fadbb3a39bb6e4fb80317745cf1634aaa130308b16d473702c84a5cd6134c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6083 13608 bytes

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