Malicious PDF — malware analysis report

Static analysis result for SHA-256 746449d228af8484…

MALICIOUS

PDF

43.0 KB Created: 2020-08-23 22:52:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fe7a38d8e962ac2b93e0e8cad5ecec4 SHA-1: d53f883555700034e1241bb0f7114d9e46aa819c SHA-256: 746449d228af84845106bc38623811d17b9c6ee8c790df74ca76c026c224d8f0
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL designed for keyword-based redirection. The document body, though heavily obfuscated, contains text that suggests a lure related to a "team member introduction ppt template". The presence of numerous external PDF links, many pointing to Shopify domains, indicates a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.com/pify?keyword=team+member+introduction+ppt+template
    • http://files.shopfreephoenix.com/uploads/1/3/2/6/132695325/7dcfefc.pdf
    • http://files.amvetspost29.com/uploads/1/3/1/4/131453853/zapasijawujimuvirite.pdf
    • http://rurapip.poetryjockeys.nl/uploads/1/3/1/4/131453301/824791.pdf
    • http://files.houseofbellator.com/uploads/1/3/0/8/130814227/deduzaxilusixom-vuxulatepojo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/pibevuzeko.pdf
    • https://cdn.shopify.com/s/files/1/0432/0028/2783/files/16906574467.pdf
    • https://cdn.shopify.com/s/files/1/0429/2925/8649/files/advantages_and_disadvantages_of_internet_communication.pdf
    • https://cdn.shopify.com/s/files/1/0431/4100/5480/files/95415106976.pdf
    • https://cdn.shopify.com/s/files/1/0435/4375/6954/files/wasteland_survival_guide_issue_5.pdf
    • https://cdn.shopify.com/s/files/1/0449/3400/4891/files/dosugoxagogisite.pdf
    • https://cdn.shopify.com/s/files/1/0431/1764/1879/files/71721889888.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/21932850646.pdf
    • https://cdn.shopify.com/s/files/1/0435/9749/6488/files/thyroid_nodules_ultrasound.pdf
    • https://cdn.shopify.com/s/files/1/0450/4502/2870/files/degaminasanuvigobeb.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/24218417351.pdf
    • https://cdn.shopify.com/s/files/1/0439/8094/7614/files/vezosevinolusefefateno.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_off00006963.bin
35a48254b6b2d91ad17f98ff555d14f5734cf5eff7a6f1af111bc088ab4c1b42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6963 5132 bytes
font_01_sfnt_off00007ab4.bin
58f6ffea3907119ed8100754d234926e837ea56ff97425d562e91cde29f8fef5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB4 10464 bytes

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