Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe0a08b915d16b7…

MALICIOUS

PDF

31.5 KB Created: 2020-08-19 23:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f065625508c0f1a3a572a65661a2920a SHA-1: af30086de04f626bbd1d694265835faee756e9ce SHA-256: abe0a08b915d16b7d42355eb8799fb9bf0f16a88550012bd1df97b82f1da1237
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'irregular plural nouns practice worksheets' and the malicious URL, suggesting a lure. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links, including a link farm, further supports a malicious intent, likely for phishing or malware distribution.

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=irregular+plural+nouns+practice+worksheets
    • http://files.withinneverwithout.com/uploads/1/3/1/8/131856306/xezizema.pdf
    • http://files.parulbouvart.com/uploads/1/3/0/8/130814017/jamorilatatofu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4623/0426/files/40537374734.pdf
    • https://cdn.shopify.com/s/files/1/0430/9132/9173/files/articles_in_german_language.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38659434623.pdf
    • https://cdn.shopify.com/s/files/1/0432/7640/2854/files/71167871473.pdf
    • https://cdn.shopify.com/s/files/1/0433/5193/3078/files/15550132912.pdf
    • https://cdn.shopify.com/s/files/1/0440/7482/7941/files/nixixoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/8248/9762/files/zopelabamejidorog.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/20637167914.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/rocketballz_stage_2_drivers.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_off000040d3.bin
8bd65bd3e8eab45e1b86c8417711382642d92c763c42987143ac86f0a39f312c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x40D3 5288 bytes
font_01_sfnt_off000052d7.bin
85591b47cb10a0c828b590cd07ff83d7f90ee68ffab3967b1b6fa5ba1f0d9287		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52D7 8904 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.