Malicious PDF — malware analysis report

Static analysis result for SHA-256 faf375e0cd754b3b…

MALICIOUS

PDF

40.5 KB Created: 2020-08-11 16:29:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f29e4effa4876f1508d9fbd8ec52c0f2 SHA-1: 486222e8ece16f86a654145167956569e042e8e6 SHA-256: faf375e0cd754b3b81d18129c1661bece020d711bc29d9dac7616fd25d349f1f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous links to other PDFs, many hosted on cdn.shopify.com. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be luring the user to click on the malicious redirector URL, which likely leads to a malicious payload or phishing page.

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=anchoring+script+in+marathi+for+college+gathering+pdf
    • http://jebox.chestervilledancers.com/uploads/1/3/1/1/131163930/6339830.pdf
    • http://files.thehammerandanvil.com/uploads/1/3/1/1/131163666/fopejot.pdf
    • http://files.pack131-wrentham.com/uploads/1/3/0/8/130813548/xisavatagesaxotutaxe.pdf
    • http://rizedusij.grubbweb.com/uploads/1/3/1/3/131398504/xukid_vagerezemolot_xomarewepozezen_bedezuziratujir.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/61587671118.pdf
    • https://cdn.shopify.com/s/files/1/0440/8328/2070/files/undercover_economist.pdf
    • https://cdn.shopify.com/s/files/1/0431/2222/9397/files/takaxevilugezelepurimix.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/lesapimakedez.pdf
    • https://cdn.shopify.com/s/files/1/0441/2856/7448/files/acordes_de_canciones_cristianas_faciles_para_guitarra.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/57916716245.pdf
    • https://cdn.shopify.com/s/files/1/0430/5757/8138/files/jevazagovaxedax.pdf
    • https://cdn.shopify.com/s/files/1/0427/6187/9719/files/takalirosikogufutagabi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0181/3915/files/fopasamofugilakokapika.pdf
    • https://cdn.shopify.com/s/files/1/0431/5136/0164/files/maxudoxox.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5137558887.pdf
    • https://cdn.shopify.com/s/files/1/0431/5552/1695/files/72507231253.pdf
    • https://cdn.shopify.com/s/files/1/0432/0047/9391/files/81797568114.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f90.bin
38238638e71754be92d56074b42df679a66d1a1d114a1091a9bc82b4ad918787		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F90 5556 bytes
font_01_sfnt_off0000723d.bin
9429c7e7ab52553f9394f9393e92e5cad38f17ee90551ff7dbb759f673968fcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x723D 10108 bytes

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