Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bdde40707a68a28…

MALICIOUS

PDF

42.0 KB Created: 2020-08-17 06:51:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15e6a463f8d5ad09382020395a2c60c1 SHA-1: 76f54003454eecfa76c349bdf9c4d72bf694ee72 SHA-256: 1bdde40707a68a28b6fce312bbafef9297863322846fb8b6a2a0ac96575a9591
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text suggesting a lure for a 'Cadillac escalade 2015 owners manual' which, when clicked, leads to the malicious URL. The PDF_SEO_LINK_FARM heuristic further suggests this document is part of a larger link farm operation.

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=cadillac+escalade+2015+owners+manual
    • http://tubit.lesherosfourbus.com/uploads/1/3/0/8/130874038/feled.pdf
    • http://bupig.morsemotors.com/uploads/1/3/0/8/130813528/4190298.pdf
    • http://duteluv.brookeheerwaldsteiner.com/uploads/1/3/1/6/131606027/nolekadexiwod.pdf
    • https://cdn.shopify.com/s/files/1/0439/8091/4846/files/pilunafodeku.pdf
    • https://cdn.shopify.com/s/files/1/0439/9942/8766/files/so4_oxidation_number.pdf
    • https://cdn.shopify.com/s/files/1/0432/6552/3862/files/vupiredilelovupavuranima.pdf
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/gulekugupenitesax.pdf
    • https://cdn.shopify.com/s/files/1/0430/7792/7072/files/zebemirixuwivolemusesi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8488/2844/files/famigisufunenumafavugobi.pdf
    • https://cdn.shopify.com/s/files/1/0440/8049/6792/files/32792503838.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_off000064c8.bin
f5efd2360e09c0163d4b8df672802f40d45041401f02a1ee6968f2ba18019a3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64C8 5532 bytes
font_01_sfnt_off00007792.bin
446082c062d6d1c7ccd8229e833b362ebfeedead8e738879b74fe00e13efdac3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7792 10592 bytes

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