Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1dfa6e106f990da…

MALICIOUS

PDF

49.1 KB Created: 2020-11-05 10:54:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b132f003f6a1454728e0fb13a78c0624 SHA-1: 1c4acd14d2ce4997c6ec2760e2339297fa235846 SHA-256: b1dfa6e106f990da83a1631a164ed1fe151269bde97db90cf95e765b2bf13ad6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://gettraff.ru/123?keyword=movie+title+wheel+of+fortune+2+words', which is flagged as malicious. Additionally, the PDF includes a link farm pointing to other PDF documents, suggesting an attempt to manipulate search engine results or distribute further malicious content.

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://gettraff.ru/123?keyword=movie+title+wheel+of+fortune+2+words
    • https://cdn-cms.f-static.net/uploads/4408004/normal_5f95816f4e5e4.pdf
    • https://duroxogudoli.weebly.com/uploads/1/3/4/3/134318703/vanusulawepu-tofuw-paxakubosutowa.pdf
    • https://cdn-cms.f-static.net/uploads/4379841/normal_5fa37321a37ee.pdf
    • https://zeteparikimifol.weebly.com/uploads/1/3/1/6/131637109/gomewimunol_gulifu_pikaw.pdf
    • https://sijerixo.weebly.com/uploads/1/3/4/0/134042725/pedorimanaju.pdf
    • https://cdn-cms.f-static.net/uploads/4390074/normal_5f997c1693a01.pdf
    • https://jatasurow.weebly.com/uploads/1/3/4/3/134358583/793c70347d0.pdf
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5f877d5e7ce0e.pdf
    • https://gawubodukajine.weebly.com/uploads/1/3/0/9/130969599/zogukeradexeduzasug.pdf
    • https://cdn-cms.f-static.net/uploads/4402717/normal_5f96594cb3c64.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d59edbd8-2ba7-4894-af2f-38549b10f272/71422812260.pdf
    • https://uploads.strikinglycdn.com/files/d7fbcb8a-29a4-4330-b081-871e27442968/wii_owners_manual.pdf
    • https://uploads.strikinglycdn.com/files/7f2c466c-57b3-4cb2-9308-a92f4c231e86/19368436606.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_off00007a37.bin
7e0b5b631e2fe02c35333b3e37bc06212e893cd27d111dce5edcbc3246d929ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A37 5072 bytes
font_01_sfnt_off00008b9d.bin
f0688dc1ed2a20d264b0a45e01e379e86cedd322e87c88cc25b95a978484c969
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9D 12888 bytes