Malicious PDF — malware analysis report

Static analysis result for SHA-256 15270d78c0c6db05…

MALICIOUS

PDF

44.9 KB Created: 2020-08-26 07:03:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3aa14b80297278112701e1f6c679cbb8 SHA-1: 765804a74994e5e4105790877f8c990fb8b1c1b7 SHA-256: 15270d78c0c6db053cdd3a11ebfea9104a52ca50503d926811cc3227afb01850
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing for a malicious redirector link. The document body, though partially corrupted, contains text related to a printer driver and a URL that matches the redirector. The presence of a large number of external PDF links suggests 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://ttraff.ru/pify?keyword=cannon+mp600+driver
    • http://files.fhcspartanswrestling.com/uploads/1/3/2/3/132303219/ed588820.pdf
    • http://files.robertrichoux.com/uploads/1/3/2/8/132814906/4070711.pdf
    • http://files.2ndhandranch.com/uploads/1/3/0/8/130874379/diwofakuwaxev_metibepi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/55917473634.pdf
    • https://cdn.shopify.com/s/files/1/0431/7465/8216/files/vidutimixiwaxuzuzo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5965/9420/files/busogigukolabofabaloxadi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6862/8892/files/zujigasepigufab.pdf
    • https://cdn.shopify.com/s/files/1/0439/2416/0667/files/71839261626.pdf
    • https://cdn.shopify.com/s/files/1/0429/2801/3471/files/biology_research_articles.pdf
    • https://cdn.shopify.com/s/files/1/0433/7863/8999/files/safedotan.pdf
    • https://cdn.shopify.com/s/files/1/0428/1751/9772/files/zesiganalakorukog.pdf
    • https://cdn.shopify.com/s/files/1/0429/9918/5561/files/brb_cable_technical_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0437/5396/3678/files/atomic_theory_foldable.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/kepaxedodu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1866/files/28698356213.pdf
    • https://cdn.shopify.com/s/files/1/0433/5996/1239/files/nubosadoxawi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9557/2126/files/hypertension_2017_guidelines_summary.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rumifagekesodurelakalon.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_off00007284.bin
72289c11ed5ab36212006b05c486b8e4ab2f98c97325d8632a59939aae9abdc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7284 5156 bytes
font_01_sfnt_off000083f6.bin
6045da89c79c82e551777140671e3e7eccf9c1404c9e4f04fe4aad749db33fc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83F6 10200 bytes

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