Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa53eec1720228ef…

MALICIOUS

PDF

39.9 KB Created: 2020-08-11 18:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dec60630bf4e8775c3d020be825ac84f SHA-1: d006a66447c5b096e7d4ad0a625a6738e81b5fad SHA-256: aa53eec1720228ef7de99db960b9ebe65d988bbe08adf488aacfd16f7907720d
152 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a known malicious redirector, ttraff.com, which is designed to lure users into malicious sites. The document body text and embedded URLs suggest a social engineering lure related to file conversion. The ML classifier strongly supports the malicious verdict.

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=fm+bmp+to+pdf+free
    • http://files.oakfurnitureyorkshire.com/uploads/1/3/1/0/131071167/volijudap.pdf
    • http://mekajej.sheetalajmani.com/uploads/1/3/0/8/130814328/kepapum.pdf
    • http://files.twigandnibbleshop.co.uk/uploads/1/3/0/7/130740563/jewuwotuwomas.pdf
    • http://files.westviewdancetroupe.com/uploads/1/3/0/9/130969652/dawubegewesixotovam.pdf
    • http://nifug.davedthomas.com/uploads/1/3/2/7/132712615/vabavopas-fobunivosokug-rixidi-pumav.pdf
    • https://cdn.shopify.com/s/files/1/0439/1705/0008/files/62517737290.pdf
    • https://cdn.shopify.com/s/files/1/0428/5156/5724/files/10247176662.pdf
    • https://cdn.shopify.com/s/files/1/0435/2252/3288/files/sogikorovobiromiral.pdf
    • https://cdn.shopify.com/s/files/1/0432/3013/4427/files/dojuredojuwafufinegusu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1746/9086/files/66081440555.pdf
    • https://cdn.shopify.com/s/files/1/0431/4447/8874/files/torutisagadaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/6571/2535/files/how_to_make_a_fake_virus.pdf
    • https://cdn.shopify.com/s/files/1/0439/2851/8824/files/20992207046.pdf
    • https://cdn.shopify.com/s/files/1/0437/6766/0706/files/43044976468.pdf
    • https://cdn.shopify.com/s/files/1/0438/3647/3501/files/vujas.pdf
    • https://cdn.shopify.com/s/files/1/0439/8202/8958/files/15562655529.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9833/files/68143036195.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8280/files/92570246298.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_off00005fd5.bin
07ef27bb7c83ec1dc3e13d68a000d2f92f25f69faee462e9a3bcb50f744ccbfc
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD5 4864 bytes
font_01_sfnt_off0000704c.bin
26a191b99347109366b62418478b612c9b61d9573d75e876fdbbfd2d6e6018de
pdf-font-stream PDF embedded font (sfnt) at offset 0x704C 10100 bytes