Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cdd720c17fbe51c…

MALICIOUS

PDF

33.5 KB Created: 2020-08-23 16:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbf6453f98a5dd509957038db04798b6 SHA-1: fea53af2d8f76febb7935afe3e018cbdb0992a66 SHA-256: 2cdd720c17fbe51cca0904ed8c918bf358957a15fb5c140d5076c4ca766bad3f
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as an 'Icbc vehicle history report'. The document also features a link farm of numerous PDFs hosted on Shopify, likely for SEO manipulation to increase visibility. The ML classifier strongly indicated maliciousness, and the presence of multiple unknown URLs suggests a downloader or phishing attempt.

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=icbc+vehicle+history+report
    • http://womipev.rwjbhinstructors.com/uploads/1/3/2/7/132740185/wosevawaxuvimadejos.pdf
    • http://xejutu.athertoncatholicparish.com/uploads/1/3/1/0/131071231/segibunenu_mokulokatumavif.pdf
    • http://files.bfaa4us.org/uploads/1/3/2/6/132681062/519eb.pdf
    • https://cdn.shopify.com/s/files/1/0437/0304/2216/files/on_golden_pond_play_script.pdf
    • https://cdn.shopify.com/s/files/1/0447/3470/9914/files/99_names_of_allah_with_urdu_translation.pdf
    • https://cdn.shopify.com/s/files/1/0429/8683/2035/files/2996283436.pdf
    • https://cdn.shopify.com/s/files/1/0437/2843/7409/files/84152538798.pdf
    • https://cdn.shopify.com/s/files/1/0434/4047/2214/files/97757529074.pdf
    • https://cdn.shopify.com/s/files/1/0440/0067/3950/files/interpretacion_clinica_de_la_biometria_hematica_completa.pdf
    • https://cdn.shopify.com/s/files/1/0439/6879/0686/files/nikakig.pdf
    • https://cdn.shopify.com/s/files/1/0436/4120/8992/files/16609756536.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_off000047bc.bin
1cdcf69828aa2960614d1493fdb1e7b463a43382a94547ab9e966c4f720cf46b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47BC 5048 bytes
font_01_sfnt_off000058e4.bin
05b8d911d74014de5cdddc9b49e34868860b2caaedfa8ed2f4b30b95a2de0b9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58E4 9508 bytes

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