Malicious PDF — malware analysis report

Static analysis result for SHA-256 60294af404902f02…

MALICIOUS

PDF

36.2 KB Created: 2020-08-24 22:12:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 339b18aa87889460ad2bd08290c5d3c3 SHA-1: 1abae203553635619eb5869655f0b473af1d3c4b SHA-256: 60294af404902f0291f185b53a482342dc474ed0b15f0b15757a3a9764327080
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as educational resources, but the primary link redirects to a malicious domain. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's intended to trick users into visiting the malicious URL, likely as a phishing or scam lure. No scripts were extracted, but the embedded URLs are the primary indicators 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.com/pify?keyword=mcgraw+hill+ryerson+chemistry+12+answers
    • http://files.mindfulpsych.com/uploads/1/3/1/3/131378932/ritukaneli.pdf
    • http://files.africadecorationalart.com/uploads/1/3/0/9/130969166/firoxewelaweki-rilaxenudek-fekaku-pajexowigaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0448/6758/4162/files/beehive_class_9_ncert_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/0700/7141/files/belvedere_teachers_college_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/7932/7141/files/applied_numerical_methods_with_matlab.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/22301527725.pdf
    • https://cdn.shopify.com/s/files/1/0436/9324/4570/files/minotomivuvuxapakajut.pdf
    • https://cdn.shopify.com/s/files/1/0433/3531/9711/files/67226529723.pdf
    • https://cdn.shopify.com/s/files/1/0435/4372/4186/files/wawojutibugukiwuwi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/software_engineering_principles.pdf
    • https://cdn.shopify.com/s/files/1/0432/4940/2016/files/kezawideboketeridogabaxa.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/53086302431.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/xutopizesorupipafa.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/18298129710.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_off00004dc3.bin
fc432c996d5d4f0b814aa586e39c1db336c77a1a44e54b76124a9a20f6773a13
pdf-font-stream PDF embedded font (sfnt) at offset 0x4DC3 5596 bytes
font_01_sfnt_off000060cc.bin
c0bd67906ba647f0517f75a15a2697944c57d9971582ffc67f4a07682c3fc303
pdf-font-stream PDF embedded font (sfnt) at offset 0x60CC 9820 bytes