Malicious PDF — malware analysis report

Static analysis result for SHA-256 37edb97a92514937…

MALICIOUS

PDF

42.5 KB Created: 2020-08-19 02:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12ed6e7d6c9f0253baae9c1eb728b825 SHA-1: b88cbcffd981491decb4471585eab6d00bd62458 SHA-256: 37edb97a9251493709ee6cd99b2b5d38c0abe888ee02772964a1c2c83ec0950d
92 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'ttraff.com'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the primary intent is to lure the user to this external site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • 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=atopic+dermatitis+treatment+guidelines+nice
    • http://files.forestcobbler.co.uk/uploads/1/3/0/7/130738806/1c4256f75ae5a00.pdf
    • https://cdn.shopify.com/s/files/1/0431/0954/8188/files/budget_2020_19_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/48921533363.pdf
    • https://cdn.shopify.com/s/files/1/0430/0144/6554/files/kibujewapalewimewinedege.pdf
    • https://cdn.shopify.com/s/files/1/0429/6831/8105/files/sekefegosezuxitog.pdf
    • https://cdn.shopify.com/s/files/1/0440/2741/2645/files/67400788436.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23063093424.pdf
    • https://cdn.shopify.com/s/files/1/0437/7100/3037/files/37893754182.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_off00006784.bin
176574c8c6a3b62c1595d4674f29afeb2fec54e487cbbee3b6eb5095fff60f2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6784 5380 bytes
font_01_sfnt_off000079a9.bin
d5757da83f91821fa3b2dbab6b221c56d8cdb0a5c2af1b30c8f8f46e07184046		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79A9 10364 bytes

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