Malicious PDF — malware analysis report

Static analysis result for SHA-256 152fc7bd9737f9cb…

MALICIOUS

PDF

46.2 KB Created: 2020-08-23 12:26:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8099f92aa031739a4bd659d392a140bb SHA-1: ac9e8efe3c29950925eaf720b16215b1aadab4f2 SHA-256: 152fc7bd9737f9cb50efad1856fd0980efac2144e64a8f8ccadb560635f54ed7
154 Risk Score

Malware Insights

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

The PDF document contains numerous links, many of which point to a link farm designed to manipulate search engine results. One prominent link, 'https://ttraff.ru/pify?keyword=odometer+correction+software+for+android', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to odometer correction software, suggesting a lure to a malicious site.

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=odometer+correction+software+for+android
    • http://gazik.wivco.com/uploads/1/3/0/8/130874359/vedaxeworivemawi.pdf
    • http://wefomi.fitrisslightstudios.com/uploads/1/3/1/3/131398351/4585229.pdf
    • http://jejep.travelwithgenie.com/uploads/1/3/1/4/131407406/0e34635c2b17f9.pdf
    • http://files.vibewithshannon.com/uploads/1/3/1/3/131381542/merazexamona_rewufunav_rapolubu_luzetipuvobel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/1639/4648/files/8434337792.pdf
    • https://cdn.shopify.com/s/files/1/0433/6350/0197/files/talokupudovaposupebim.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/pdf_xchange_serial.pdf
    • https://cdn.shopify.com/s/files/1/0439/9972/3678/files/rodoxaladiw.pdf
    • https://cdn.shopify.com/s/files/1/0435/4503/4911/files/50551427041.pdf
    • https://cdn.shopify.com/s/files/1/0440/4926/8886/files/99401250851.pdf
    • https://cdn.shopify.com/s/files/1/0428/9508/1625/files/afcat_2020_1.pdf
    • https://cdn.shopify.com/s/files/1/0448/1895/6448/files/mods_for_medieval_2_total_war.pdf
    • https://cdn.shopify.com/s/files/1/0429/4007/2092/files/94640204228.pdf
    • https://cdn.shopify.com/s/files/1/0434/4253/6604/files/53236944495.pdf
    • https://cdn.shopify.com/s/files/1/0450/9148/7909/files/attacking_faulty_reasoning.pdf
    • https://cdn.shopify.com/s/files/1/0430/8258/0130/files/25033239203.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_off0000761f.bin
091e4e3007cb739a55137fe2f06367b41aa16460057411558e61b62327811579		 pdf-font-stream PDF embedded font (sfnt) at offset 0x761F 5256 bytes
font_01_sfnt_off000087f6.bin
ab623ab95b1cdcdb6ee691fb52a43d8baad97a90ae6831c3b191d5e3b0b54ef1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87F6 10388 bytes

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