Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fd6fb2b3523b810…

MALICIOUS

PDF

40.4 KB Created: 2020-08-17 16:45:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a26f6dc9a2c79038989734d574f830d2 SHA-1: 8bdfdc12cb7e0654d5acdb9b2982cf4b2bd49318 SHA-256: 5fd6fb2b3523b8107d6ab93cc4d039684c11f5170c175bc84c6a87d61b5171ad
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to further malicious content. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, many of which are hosted on Shopify. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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=arte+contemporaneo+definicion+pdf
    • http://files.lifespirepa.com/uploads/1/3/1/3/131397955/4127110.pdf
    • http://files.jashancatering.com/uploads/1/3/2/6/132695862/lowulisa_liwuwumadoz.pdf
    • http://xuxejom.livingfaithcommunities.com/uploads/1/3/2/8/132814930/gojaleji-xelimasuxi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/6332/9446/files/dixieland_jazz_trumpet_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/64090605543.pdf
    • https://cdn.shopify.com/s/files/1/0434/6445/8405/files/rainmeter_taskbar_replacement.pdf
    • https://cdn.shopify.com/s/files/1/0429/2925/8649/files/advantages_and_disadvantages_of_internet_communication.pdf
    • https://cdn.shopify.com/s/files/1/0435/8671/5805/files/valevejupitilotawatil.pdf
    • https://cdn.shopify.com/s/files/1/0437/8004/6997/files/xuvuwununixerapidonedap.pdf
    • https://cdn.shopify.com/s/files/1/0440/5516/7126/files/silimuzimiroxolu.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_off00005e16.bin
0a13aa937eed4aaf19f14183b7c0f093147de32464b7ead045a785171b688606
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E16 5080 bytes
font_01_sfnt_off00006f3d.bin
b1688e001996ef54b46316567638195cbbfcd4041078ddef44d264d9cfbbe2f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3D 11160 bytes