Malicious PDF — malware analysis report

Static analysis result for SHA-256 101efab9cd794397…

MALICIOUS

PDF

52.2 KB Created: 2020-08-11 08:30:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4c21c901e39e335ae81935ce3d2b1ad SHA-1: 5a6201732d63e07c872372d2ed15ab3a2705d5e5 SHA-256: 101efab9cd794397102a50d5f3b0966fd64f25f661211d8ad456f604ee5f3995
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector pointing to 'https://ttraff.cc/pify?keyword=nx+12+assembly+tutorial+pdf'. This suggests the document is designed to trick users into visiting malicious sites, likely for phishing or to download further malware. The ML classifier strongly supports the malicious nature of this PDF.

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/pify?keyword=nx+12+assembly+tutorial+pdf
    • http://safawo.kitchenvisions.co.uk/uploads/1/3/0/7/130775735/juzunud_purikares.pdf
    • http://goxarewun.provacademy.com/uploads/1/3/1/1/131164312/bigivokonewuxij.pdf
    • http://files.shawneefreemasons.org/uploads/1/3/1/6/131607010/suwakexoselexik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3348/5727/files/kazixogog.pdf
    • https://cdn.shopify.com/s/files/1/0430/0275/7281/files/13405830598.pdf
    • https://cdn.shopify.com/s/files/1/0429/3227/3319/files/58985363202.pdf
    • https://cdn.shopify.com/s/files/1/0429/7791/9129/files/38838211183.pdf
    • https://cdn.shopify.com/s/files/1/0434/6904/5926/files/quran_with_urdu_translation_and_tafseer.pdf
    • https://cdn.shopify.com/s/files/1/0432/5795/4467/files/right_to_information_act_amendment_bill_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/9289/3093/files/50851981723.pdf
    • https://cdn.shopify.com/s/files/1/0429/2762/0249/files/gauge_theories_in_particle_physics_a_practical_introduction.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86372263330.pdf
    • https://cdn.shopify.com/s/files/1/0439/8376/5662/files/ladotigurodom.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_off00008e60.bin
8d28c4051fd8236723477336a6a34e9873d8c0b9277a787ea1edd7f2006f9ade
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E60 5648 bytes
font_01_sfnt_off0000a189.bin
17265103591a4b0ab27416846645a4776ef8611f42668668d61357b3bfd42ecd
pdf-font-stream PDF embedded font (sfnt) at offset 0xA189 10072 bytes