Malicious PDF — malware analysis report

Static analysis result for SHA-256 7428df3838bdf876…

MALICIOUS

PDF

41.9 KB Created: 2020-08-09 01:07:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11b6ba7c6de90ef6d29813d28606a7b8 SHA-1: e4980330398516a458479725c4e3d5ed178a386d SHA-256: 7428df3838bdf876c71699050efe728006e764862b9384fd58cead4a2357c3fb
154 Risk Score

Malware Insights

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

This PDF contains a large number of embedded links, many of which point to benign Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to this malicious infrastructure. The primary attack pattern involves using a link farm to disguise a malicious redirector, likely as part of a phishing or scam campaign.

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.ru/pify?keyword=coldplay+yellow+sheet+music+pdf
    • http://files.gerhardsnewsblog.com/uploads/1/3/1/4/131454049/wologop_wazixebonamunon_lesaxategep_zogot.pdf
    • http://files.gregglohman.com/uploads/1/3/0/9/130969150/vareb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8716/7637/files/cauliflower_recipes_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/6778469529.pdf
    • https://cdn.shopify.com/s/files/1/0452/1240/1815/files/tabeer_ur_roya.pdf
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/articles_about_values_education.pdf
    • http://files.herb-and-dew.square.site/uploads/1/3/1/8/131871597/5075157.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2191/files/lomuberata.pdf
    • https://cdn.shopify.com/s/files/1/0437/5078/5173/files/naruto_shippuden_episode_283_english_dubbed.pdf
    • https://cdn.shopify.com/s/files/1/0428/2921/7958/files/35033484881.pdf
    • https://cdn.shopify.com/s/files/1/0437/6992/1688/files/tulazufudelinajoxuwav.pdf
    • https://cdn.shopify.com/s/files/1/0429/0281/4876/files/bevozitegejutivazujeruxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/15704572711.pdf
    • https://cdn.shopify.com/s/files/1/0434/2104/0789/files/student_learning_outcomes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wefudebavisizaku.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/74113696440.pdf
    • https://cdn.shopify.com/s/files/1/0435/1849/2824/files/pimipijololojukufix.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_off00006612.bin
45be622ee5be0b10d17f39f40f7f81c735424e3a923b999b8d94e0f198dedc17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6612 5400 bytes
font_01_sfnt_off00007861.bin
6308bf9b49c7a65c53bbe03a642f5465f7246ebc5112ae7afd3de95d724ea7f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7861 10060 bytes

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