Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14defee1815ffe3…

MALICIOUS

PDF

40.2 KB Created: 2020-08-28 11:54:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af2fd2a543670894b4dd064a182f4477 SHA-1: f9cffd49ab4e1531fc081b94c0ce3c7448f19700 SHA-256: c14defee1815ffe37591d81972028a28ccbf26b63c9fad742513b329438f99f6
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, indicative of a link farm. The primary malicious URL identified is https://ttraff.club/pify?keyword=texes+ppr+160+study+guide, which likely serves as a gateway to further malicious content. The document body contains obfuscated text and references to a study guide, suggesting a lure to entice users to click on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.club/pify?keyword=texes+ppr+160+study+guide
    • http://fabir.altmeds.org/uploads/1/3/0/7/130776659/luvezapupo.pdf
    • http://winubiva.ratagordon.com/uploads/1/3/1/8/131872225/dusenoliwuf.pdf
    • http://files.elocaldelivery.com/uploads/1/3/2/7/132740541/jedop_raziv.pdf
    • http://files.koolartclub.co.nz/uploads/1/3/1/3/131379277/pifomete.pdf
    • http://gejuwoxe.saclegalprep.com/uploads/1/3/2/7/132712237/buridulof-nofusavuselazi-fetimowas.pdf
    • https://cdn.shopify.com/s/files/1/0428/8564/4447/files/xelijuro.pdf
    • https://cdn.shopify.com/s/files/1/0439/4477/1739/files/zalulujafesuxor.pdf
    • https://cdn.shopify.com/s/files/1/0441/2679/7976/files/88081759380.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6690/files/toxosofiguzodo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/22318020525.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/56113704811.pdf
    • https://cdn.shopify.com/s/files/1/0432/1184/9890/files/legiguvukidekopuradojes.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/45598646272.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_off00005e60.bin
66ac98eafb336e9ae176b8da7c5c5ffdfd83194620f0919961a3f406c2ea7ca1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E60 5352 bytes
font_01_sfnt_off000070c3.bin
f7644589fdc2652a4b79589a31d77ad899cb3f91f11ed588aed0d021d721409d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70C3 10472 bytes

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