Malicious PDF — malware analysis report

Static analysis result for SHA-256 58017ad725d3dcbb…

MALICIOUS

PDF

45.6 KB Created: 2020-08-31 06:20:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdfecb69bb580abf3c1d89e54ce76149 SHA-1: 7238483c0d6738f73f0ddb201b99a49ac0515260 SHA-256: 58017ad725d3dcbb0c672380cec6814c0cd14be45d4e16b229a77615831166e4
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and text related to a 'Warframe clan dojo guide', suggesting a social engineering lure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be directing the user to a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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=warframe+clan+dojo+guide
    • https://cdn.shopify.com/s/files/1/0437/6769/3474/files/unique_character_names.pdf
    • https://cdn.shopify.com/s/files/1/0435/6400/7585/files/java_plugin_chrome.pdf
    • https://cdn.shopify.com/s/files/1/0433/0792/5654/files/62079825973.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9772/files/a_concise_introduction_to_pure_mathematics_4th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3799/files/zuboguxuzofewamelefo.pdf
    • https://static.usrfiles.com/ugd/238140_0c3f7c9ccf0a4e71bb513891c28b9be2.pdf
    • https://static.usrfiles.com/ugd/451461_0f5870f08e974ce5baeaaee8cf72fc35.pdf
    • https://static.usrfiles.com/ugd/b8c837_279de8707dcb49ad9ac2d1080874302e.pdf
    • https://static.usrfiles.com/ugd/12f4eb_de7da0259f6b45cd81157442916dcc4c.pdf
    • https://static.usrfiles.com/ugd/33a16d_51d9351b37de4ec48b18d04d7cb0d6be.pdf
    • https://static.usrfiles.com/ugd/238140_7b8b5dfe3fd043e795d07bc54833d058.pdf
    • https://cdn.shopify.com/s/files/1/0445/5114/3588/files/etiology_of_hypertension_journal.pdf
    • https://cdn.shopify.com/s/files/1/0431/3022/4794/files/susojujofisivoruvew.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_off0000753e.bin
49edca398bbb560084716371c7c83e73073bbf644f45de4710778ad91e5cde38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x753E 5252 bytes
font_01_sfnt_off00008713.bin
81e0d5ac8721c8b54cd6aa023ec094ed48cf14a708b9e80749e71877961b8a0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8713 10120 bytes

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