Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c343e5f9b3370f…

MALICIOUS

PDF

34.8 KB Created: 2020-08-04 09:37:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5226f5c399b2bde3dd105cc1602ffe9 SHA-1: e914e4bc291e9fefd48c394de693f2cbcb36f072 SHA-256: 30c343e5f9b3370f74b510086f418ab8c53a817682de6a41c94da97030d2470a
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link redirecting to a known malicious URL (ttraff.cc). The document body, though heavily obfuscated, contains the same malicious URL. This indicates the document's purpose is to deliver users to malicious infrastructure, likely for phishing or malware distribution. The ML classifier strongly supports the malicious verdict.

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=bendix+valve+catalog+pdf
    • http://files.kennetheugenepeters.com/uploads/1/3/0/7/130775220/db55be70.pdf
    • http://files.backyardboyslandscaping.com/uploads/1/3/0/7/130775350/lorarerexodig.pdf
    • http://files.plantwisdomgardencenter.com/uploads/1/3/2/3/132303406/ratorumatulag.pdf
    • http://files.eaglespiritacademy.com/uploads/1/3/1/1/131164047/vuteximonitusorore.pdf
    • http://files.americanbellydance.com/uploads/1/3/0/8/130814057/45125.pdf
    • https://cdn.shopify.com/s/files/1/0430/3811/3955/files/nawanedinezonazopadejo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5225/files/22103710512.pdf
    • https://cdn.shopify.com/s/files/1/0435/4962/2431/files/ratizapigajul.pdf
    • https://cdn.shopify.com/s/files/1/0433/5829/0070/files/50712828520.pdf
    • https://cdn.shopify.com/s/files/1/0434/4777/9478/files/w3schools_bootstrap_tutorial_pdf_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/8200/7199/files/12021979646.pdf
    • https://cdn.shopify.com/s/files/1/0440/6683/2534/files/kupomezofebovokirobu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7103/6822/files/60000530925.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0931/files/webopisozogutane.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/2015_rent_certificate.pdf
    • https://cdn.shopify.com/s/files/1/0432/6231/2611/files/nezonarekozepow.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8980/files/wodatiboludokegonutalego.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_off00004aef.bin
353fc8e71064cf4d3cce67dc4624526036de1e2ef71993cd1393b8ee6f191ad2
pdf-font-stream PDF embedded font (sfnt) at offset 0x4AEF 5224 bytes
font_01_sfnt_off00005ce0.bin
b750922bd305445013da3a7a90dc4715778c84d376fe8cd06ca30ec2261980c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE0 10052 bytes