Malicious PDF — malware analysis report

Static analysis result for SHA-256 18348257b3808357…

MALICIOUS

PDF

48.1 KB Created: 2020-08-12 03:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10fe0cdf5f5ac1ad2aa5796536250ae4 SHA-1: 9ab23f6f85e11f65ad5aec5df77790db06d01fbc SHA-256: 18348257b3808357e9381dbb45dcfb33f05340661a7fca682ce8cb5777919b9f
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one pointing to a known malicious redirector infrastructure at 'ttraff.com'. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' indicates the document's content is designed to trick users into fraudulent financial transactions. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm intended to manipulate search engine results or distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=advanced+business+writing+skills+pdf
    • http://files.tikihula.com/uploads/1/3/1/4/131483336/941f672bf530f.pdf
    • http://xibup.b4rnpr.org/uploads/1/3/0/7/130738632/8ddd105779b8.pdf
    • http://files.apolloartdocent.com/uploads/1/3/0/8/130814169/c3e9a6f9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5106/5243/files/58530616985.pdf
    • https://cdn.shopify.com/s/files/1/0439/7573/7502/files/turnigy_9x_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/8300/5078/files/10675442937.pdf
    • https://cdn.shopify.com/s/files/1/0431/7016/8986/files/joripikiwivixe.pdf
    • https://cdn.shopify.com/s/files/1/0435/4605/0714/files/using_statistical_methods_in_social_science_research.pdf
    • https://cdn.shopify.com/s/files/1/0434/6776/7970/files/linkin_park_the_hunting_party_zip.pdf
    • https://cdn.shopify.com/s/files/1/0437/9131/9201/files/zuxapubakusomowo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0777/8717/files/19644308845.pdf
    • https://cdn.shopify.com/s/files/1/0433/3171/5225/files/biosurfactant_production.pdf
    • https://cdn.shopify.com/s/files/1/0433/3685/9813/files/pobomiletiwo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52209678420.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_off00007b95.bin
cc45769ec93a1c72b1abe15235994b576281694bafa82aaf05981a3aaf6b577a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B95 5668 bytes
font_01_sfnt_off00008efe.bin
995fb2ce0d1072a0d13134982d6ff18687972ae1367e681f9f3df30c7952dac7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EFE 10748 bytes

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