Malicious PDF — malware analysis report

Static analysis result for SHA-256 73ebfcb3c834b030…

MALICIOUS

PDF

40.5 KB Created: 2020-08-31 09:29:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b88b4715e8762b89444ef164b46a6d8 SHA-1: 192b7c10df5c719a9ef599477ba1aad1381a88be SHA-256: 73ebfcb3c834b0300a87fb6ecb3171182a03d5df62b52071fb5ea8991b5582b9
152 Risk Score

Malware Insights

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

This PDF document contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a 'pokemon x and y android game' lure, suggesting a social engineering attempt to trick users into clicking the malicious link. The presence of a link farm and a critical heuristic firing for a malicious redirector strongly indicate a phishing or malware distribution 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.ru/wix?keyword=pokemon+x+and+y+android+game
    • https://cdn.shopify.com/s/files/1/0434/0255/9655/files/xuzugepenolixazew.pdf
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/swimming_pool_rules_and_regulations.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/ludowowaxigobapi.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1b405fb8ba84b7eadd8756f7b612aad.pdf
    • https://static.usrfiles.com/ugd/b8c837_01ea57b9614d43c18c39151d72285354.pdf
    • https://static.usrfiles.com/ugd/ee9d3f_69c33c0c61ee47d9b9ac29698ff3be5d.pdf
    • https://cdn.shopify.com/s/files/1/0437/6284/3797/files/68305126983.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/gogudozedukinowod.pdf
    • https://cdn.shopify.com/s/files/1/0430/7232/3737/files/7348257597.pdf
    • https://cdn.shopify.com/s/files/1/0431/4624/8358/files/daxotabukobipukubo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8478/3509/files/wavafidakatilef.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_off000061d0.bin
24c71114ed1eadf8e181ae562d44eae06cc612b7d1a62c58c9a503799897104a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D0 5172 bytes
font_01_sfnt_off00007359.bin
a487adc840b76a8d14d03fe1810102c02c3805a727c7341c90eed0c80c39c9ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7359 10020 bytes

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