Malicious PDF — malware analysis report

Static analysis result for SHA-256 9877950a0710a4b5…

MALICIOUS

PDF

37.2 KB Created: 2020-04-05 06:39:47 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c66a0d7a1c674cb3d6ea05c5e7498e2a SHA-1: 22531e143c2713d7db36f76d28370fbfc9941b10 SHA-256: 9877950a0710a4b5cca23ff58e002cff311497943042ba8c523f64da97fef0f1
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO poisoning tactic. The document body, though partially corrupted, contains text related to 'Troy bilt 2410 snow blower carburetor cleaning' and references the wkhtmltopdf tool, indicating a potential lure to drive traffic to unrelated or malicious content hosted on the numerous external domains. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://tarasnaumenko.com/uploads/1/3/0/3/130313002/130313002.html#troy+bilt+2410+snow+blower+carburetor+cleaning
    • http://championticketraffler.com/uploads/1/3/1/4/131438190/toxujave_faroxumutaridik_rotijosox.pdf
    • http://tornadocleanbins.com/uploads/1/3/0/6/130603896/zezamimi.pdf
    • http://lahaina.gallery/uploads/1/3/0/9/130969339/vivisanug.pdf
    • http://iaracury.com/uploads/1/3/0/2/130289800/9302130.pdf
    • http://lilyarndesignco.com/uploads/1/3/0/7/130739755/88c2405c5.pdf
    • http://gorushit.xyz/uploads/1/3/0/3/130313358/vofasu-nujakekoj-nigabuwefosudin-juxorog.pdf
    • http://yogatherapyalliance.com/uploads/1/3/0/4/130435667/1a3c0.pdf
    • http://jackcook1508.com/uploads/1/3/0/2/130272458/2849841.pdf
    • http://princessplie.us/uploads/1/3/0/7/130775759/botejukuboleriz.pdf
    • http://living-waterlandscapes.com/uploads/1/3/0/3/130323339/74776efd342c2e.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006794.bin
c4c65458f32305b6ad59ae91a2b19f290b6e55a02c643646e924e01a7cca9bf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6794 8564 bytes

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