Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b1168a1ab2643b3…

MALICIOUS

PDF

42.3 KB Created: 2020-08-04 23:30:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 179cbaf1b0cd3d9b26e2b2030f3f37b8 SHA-1: 230803fc4a3f5604b3262389925ccbce11adaa2d SHA-256: 0b1168a1ab2643b3bd2e437b2775b391d028f22e6c58b108fef3186a6e7fd947
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to other sites. One prominent URL, https://ttraff.com/pify?keyword=academic+essay+example+pdf, is identified as a malicious redirector. The document's content and structure suggest it is part of a phishing or scam campaign aiming to drive traffic to malicious infrastructure.

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.com/pify?keyword=academic+essay+example+pdf
    • http://files.judilane.com/uploads/1/3/2/6/132695915/wabaxizoko-jipivowufufekos-suvigitu-golunakipudagib.pdf
    • http://files.muusan.org/uploads/1/3/1/1/131163667/ee82b3ff.pdf
    • http://files.rozelcruz.com/uploads/1/3/2/7/132740337/4077060.pdf
    • http://files.madridistasatl.com/uploads/1/3/2/7/132740580/rezomipaxugu.pdf
    • http://files.bethelcrcyouth.com/uploads/1/3/0/8/130813777/nozejagajalu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72710717911.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/91085781134.pdf
    • https://cdn.shopify.com/s/files/1/0429/5049/2316/files/tadokagube.pdf
    • https://cdn.shopify.com/s/files/1/0434/1750/1852/files/xepodofijafafitivam.pdf
    • https://cdn.shopify.com/s/files/1/0432/6745/7188/files/zasukijosa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0048/7332/files/kapubukinisadukikor.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/xesiwa.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/72178329878.pdf
    • https://cdn.shopify.com/s/files/1/0440/4209/2694/files/84016360267.pdf
    • https://cdn.shopify.com/s/files/1/0428/8305/5782/files/fepekuzuvozubejopiluxo.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_off0000693f.bin
9b5ddcdfe0afc2d914c2260bc97c62a18e4c231a5f14b5b1ae487233bee49605
pdf-font-stream PDF embedded font (sfnt) at offset 0x693F 5364 bytes
font_01_sfnt_off00007b82.bin
82fde8148882d66df52471792aa2ef8bd5e6b6252c750ab3da7932e0ddf24392
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B82 9684 bytes