Malicious PDF — malware analysis report

Static analysis result for SHA-256 f93b36d59c27a5d3…

MALICIOUS

PDF

63.7 KB Created: 2020-07-09 17:31:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 086896f54a2e9ae48fa8a2788adffe3b SHA-1: 74a0d4c7c3afb5d4ce1fe286754715596316bed6 SHA-256: f93b36d59c27a5d3d435fbe60e4e082de0ec95da91efa22546136b2679fe6087
152 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier and contains a large number of embedded external links. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.cc/wb?keyword=energie%20renouvelable%20definition%20pdf'. The document body, though heavily obfuscated, also contains this URL. The presence of a mass external PDF link farm suggests a coordinated effort to distribute traffic or host content across numerous domains, a common tactic for SEO manipulation or distributing malware.

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.cc/wb?keyword=energie%20renouvelable%20definition%20pdf
    • http://files.sisterspiritwomensharingspirituality.org/uploads/1/3/2/8/132815154/58853863.pdf
    • http://files.robcalamedia.com/uploads/1/3/1/3/131398134/xoliwulonuje.pdf
    • http://files.greatesthitswebsite.com/uploads/1/3/1/1/131164567/lenowufufaku_jofasug_tasaborex.pdf
    • http://files.bacmedicaltourism.com/uploads/1/3/2/6/132695994/rinarezafugok.pdf
    • http://files.agathafashion.shop/uploads/1/3/0/9/130969375/9654079.pdf
    • http://files.seedschurch.net/uploads/1/3/0/7/130739315/tekejul_xudekovatilav_kimozetoto_dokizixuret.pdf
    • http://files.ataraxiaphotography.com/uploads/1/3/1/4/131455883/jazozixure.pdf
    • http://files.confederateplanet.com/uploads/1/3/0/7/130776123/4186642.pdf
    • http://files.victoriaharbourfestival.com/uploads/1/3/0/8/130814345/717847bba44.pdf
    • http://files.pottershouse.cz/uploads/1/3/1/1/131164012/pulixuvasa-xepuzuxe-guper-nuwijajijojerer.pdf
    • http://files.newyorkstategrandcouncil.com/uploads/1/3/1/4/131437538/bapemo.pdf
    • https://gaborejo.files.wordpress.com/2020/07/puminilivakunifa.pdf
    • https://telomema.files.wordpress.com/2020/07/damusajufebodabuvibobi.pdf
    • https://kojesurobiza.files.wordpress.com/2020/06/fumedukuxonozasalegobepur.pdf
    • https://kuramajibi.files.wordpress.com/2020/06/73884200938.pdf
    • https://duxugol.files.wordpress.com/2020/06/wewirupajozozasi.pdf
    • https://gabufiv745489397.files.wordpress.com/2020/06/givigax.pdf
    • https://boxejot.files.wordpress.com/2020/06/vunil.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sasukeseduvemuledup.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99781003244.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60527157158.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/
    • https://telomema.files.wordpress.com/2020/07/damusajufebodabuvibo

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1cc.bin
d471fd4acd23b2fb94ba8b2b010d8b79fc8fb40c733970c91263515955f9c472		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1CC 5072 bytes
font_01_sfnt_off0000c317.bin
b4070751a90de35003b6f342eb331b239ff4507c64f120928e89f202ea7658e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC317 14736 bytes

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