Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f1f7ea40ab15bc9…

MALICIOUS

PDF

36.2 KB Created: 2020-08-19 21:48:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42b789d8d443023cf14a479727d355cc SHA-1: f29891b10a1686e0c126f83ac81e76dea460ec56 SHA-256: 4f1f7ea40ab15bc9a74efd9c1c7f747f5d4eeb7a4fe17bd1b04287fe9fe14654
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.com/pify?keyword=biltek+koleji+i%25C5%259F+ba%25C5%259Fvuru+formu', leads to known malicious infrastructure. The document also contains a large number of embedded links to PDFs hosted on various domains, suggesting a link farm or distribution mechanism. No scripts were extracted, and the document body itself is heavily obfuscated, making it difficult to determine the exact payload.

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.com/pify?keyword=biltek+koleji+i%25C5%259F+ba%25C5%259Fvuru+formu
    • http://vusexuvi.ballyglasschildcare.net/uploads/1/3/2/7/132712116/9063475.pdf
    • http://files.qsdgroup.com.au/uploads/1/3/0/7/130776001/e0305e4c325.pdf
    • http://files.susankain.com/uploads/1/3/2/6/132682204/lisin_nunomonuloxogaf_rumiropovasetud.pdf
    • http://files.zemorahchristianacademy.org/uploads/1/3/1/3/131379382/divukubanal.pdf
    • http://files.southwestcactusshop.com/uploads/1/3/2/7/132711999/e7b3dc9467d.pdf
    • https://cdn.shopify.com/s/files/1/0440/4461/5830/files/kevikevizimudikijo.pdf
    • https://cdn.shopify.com/s/files/1/0438/9427/6264/files/leche_de_almendras_propiedades.pdf
    • https://cdn.shopify.com/s/files/1/0433/0625/4494/files/apj_abdul_kalam_essay.pdf
    • https://cdn.shopify.com/s/files/1/0434/5122/0124/files/80494057375.pdf
    • https://cdn.shopify.com/s/files/1/0427/3537/0407/files/soviwetisujagem.pdf
    • https://cdn.shopify.com/s/files/1/0434/0406/6967/files/30745365467.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/lorure.pdf
    • https://cdn.shopify.com/s/files/1/0427/9376/2975/files/42631267273.pdf
    • https://cdn.shopify.com/s/files/1/0439/3605/5454/files/botezojonekoreruzubukajov.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/10672957317.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_off00004c0d.bin
c25473160a3dbf379001936a13a84c6b6575efa06514453d5da4ef2633cfec3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C0D 5372 bytes
font_01_sfnt_off00005e45.bin
80c427cd3c7ed73e1552144b0f14eebf6ab5f4956a3875ebf995d9349e81d396		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E45 11608 bytes

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