Malicious PDF — malware analysis report

Static analysis result for SHA-256 0efb8bbf9407a883…

MALICIOUS

PDF

45.7 KB Created: 2020-08-17 05:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c85914679b782fbfe4aab2150629152d SHA-1: f77f333c0b35da65649b1e8a454c03d3345c07a1 SHA-256: 0efb8bbf9407a883e379682a0704437832d5082a24585f03212a9d91eaeaac62
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a link farm pointing to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=brilliant+legacy++sub+indo'. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to lure users to malicious sites, likely for phishing or further payload delivery.

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=brilliant+legacy++sub+indo
    • http://tazimuw.nabclean.com.au/uploads/1/3/1/6/131607131/mabotujowikopasataxo.pdf
    • http://gopolop.jamesedwardhughes.com/uploads/1/3/1/4/131437709/vevimenarog-rokaduwilakef.pdf
    • http://files.ourcolourfulworld.com/uploads/1/3/1/4/131453574/8528d99d0.pdf
    • http://jozuler.querubicamp.com/uploads/1/3/0/8/130873995/wowega.pdf
    • http://files.trueleadershipretreat.org/uploads/1/3/0/7/130776409/vowovitala-sefeluj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36283751979.pdf
    • https://cdn.shopify.com/s/files/1/0434/7016/0032/files/linux_commands_for_aws.pdf
    • https://cdn.shopify.com/s/files/1/0434/3313/2193/files/kabiramemopobilowosulije.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/tasavemolezimaduwa.pdf
    • https://cdn.shopify.com/s/files/1/0427/6961/2966/files/nejibomimawotitimilusidu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2068/1377/files/the_canterbury_tales_modern_english.pdf
    • https://cdn.shopify.com/s/files/1/0440/2007/2613/files/manifestation_of_the_holy_spirit.pdf
    • https://cdn.shopify.com/s/files/1/0432/0614/8255/files/pasixokefetixut.pdf
    • https://cdn.shopify.com/s/files/1/0427/9821/9420/files/babijasutisiporubut.pdf
    • https://cdn.shopify.com/s/files/1/0433/6202/5624/files/23464312427.pdf
    • https://cdn.shopify.com/s/files/1/0434/0432/9125/files/49013339561.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_off00006691.bin
b3bdf9f2102c4f0d8d7823b38012386ef2c1865276d33ab8d4ceec43d8e5e701		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6691 5396 bytes
font_01_sfnt_off000078f0.bin
03aa65b7b7afb1168cc12f988b68528085c686a2a7c6e5b6d9a0c83e90471697		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78F0 16020 bytes

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