Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da3eaeb31c5dfb8…

MALICIOUS

PDF

163.1 KB Created: 2020-08-05 01:37:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f37d30eb5e666914165776c33b8bd60e SHA-1: 10566f0fe991a26c9dc80800f44b2acfefe1d439 SHA-256: 0da3eaeb31c5dfb8f4bff9bf2e04f43697f99aafe2d0ce514ac914424b4b7595
134 Risk Score

Malware Insights

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

The PDF contains a heuristic indicating it's a malicious redirector link, specifically pointing to a URL that is part of an advance-fee scam. The document body, though heavily obfuscated, contains the same URL, suggesting the primary purpose is to trick the user into visiting this malicious site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • 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.cc/pify?keyword=android+studio+tutorial+pdf+2020+free+download
    • http://files.maltron.com/uploads/1/3/1/4/131438011/4357872.pdf
    • http://files.charlydigital.org/uploads/1/3/2/6/132682647/vemumazobigatod.pdf
    • http://files.kylemichelleweddings.com/uploads/1/3/2/6/132681916/6104258.pdf
    • http://lutewo.porttouristpark.com.au/uploads/1/3/0/8/130874474/4330360.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/9880/7202/files/61132562672.pdf
    • https://cdn.shopify.com/s/files/1/0433/9613/7111/files/xutapofegijitixesiju.pdf
    • https://cdn.shopify.com/s/files/1/0430/7510/9013/files/36820878814.pdf
    • https://cdn.shopify.com/s/files/1/0436/9140/9561/files/fb._com_logout.pdf
    • https://cdn.shopify.com/s/files/1/0430/4325/8519/files/9948976251.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/vumixinababufilinefed.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4669/files/bibum.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zitadeduwifugegumav.pdf
    • https://cdn.shopify.com/s/files/1/0430/6314/8695/files/dosirefimexuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/2494/9153/files/betobi.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_off000249b5.bin
12de6c836042636841def63e77f7f7305051cad17ce7199c5a0c0465a62d925f
pdf-font-stream PDF embedded font (sfnt) at offset 0x249B5 5392 bytes
font_01_sfnt_off00025c26.bin
07f72bd9fff27ce8b7e2c19c548ad46a4c93540c20830de186b0cb93a5043e3d
pdf-font-stream PDF embedded font (sfnt) at offset 0x25C26 9980 bytes