Malicious PDF — malware analysis report

Static analysis result for SHA-256 36f80abc53e4eafe…

MALICIOUS

PDF

41.8 KB Created: 2020-09-16 22:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0059ac2288d775993849fcf0acc94f60 SHA-1: 89212d83eab8d8feb5a8e4ad2812618c07dff533 SHA-256: 36f80abc53e4eafea98e217e93769bbdd3d54c1ff05ed06940eaebc3308d0f53
158 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains embedded JavaScript and a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/wix?keyword=skyrim+crashing+on+startup+no+mods'. This indicates the document is designed to redirect users to a malicious site, likely for phishing or malware distribution. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to obscure the malicious destination. 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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/wix?keyword=skyrim+crashing+on+startup+no+mods
    • http://potowixe.yosefrefaeli.com/uploads/1/3/0/8/130814328/batenex_poraziradukiweb_jivogakiveked_tumewirezodemil.pdf
    • https://cdn.shopify.com/s/files/1/0431/6843/2288/files/16840063768.pdf
    • https://cdn.shopify.com/s/files/1/0438/5826/4229/files/whatsapp_spy_tus_descargas_es.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7913/files/xamarin_android_emulator_mac.pdf
    • https://cdn.shopify.com/s/files/1/0431/8262/0834/files/58055646743.pdf
    • https://cdn.shopify.com/s/files/1/0436/9124/5733/files/13444938578.pdf
    • https://cdn.shopify.com/s/files/1/0452/8803/0370/files/maths_logical_reasoning_questions_with_answers.pdf
    • https://5073ecb5-de6b-4da6-93c3-bef75053cb73.filesusr.com/ugd/c1de29_a428be5fbb5b4f4d8bb66195fe971114.pdf?index=true
    • https://5a5b7d38-7f0b-4e92-9ccd-076edc9e83c5.filesusr.com/ugd/ab922d_71409b324187461ea8ce5f0513b5ff04.pdf?index=true
    • https://38725697-8af4-4f59-9cc5-8d26b5a37cf8.filesusr.com/ugd/529dbf_79abd388e7b64b1f87db2500ed3f1d63.pdf?index=true
    • https://dd894573-7770-4b88-9555-d0d04f311cde.filesusr.com/ugd/430cb2_e449efa94ff84538be7efa76e6801277.pdf?index=true
    • https://7042973a-4f66-4183-a33b-9cafd1a1436e.filesusr.com/ugd/cfbfd2_98d7eb9fed11446bab476428048956bf.pdf?index=true
    • 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_off0000641a.bin
698ee3df940a8482ca42e9c6ce2ac8d840caeadbf231a9800a95da6a7fb40b16
pdf-font-stream PDF embedded font (sfnt) at offset 0x641A 5724 bytes
font_01_sfnt_off0000777a.bin
7f0950c950a377a01c2d040811e7d631fa034156003b369fb5de61d62de57e8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x777A 10176 bytes