Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc0d38bd09e05cec…

MALICIOUS

PDF

56.1 KB Created: 2020-08-09 09:28:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 029669b00397bd4cc1b3853a0e812f00 SHA-1: 261314c5c7253d1caca10925c737306c61b55ddd SHA-256: dc0d38bd09e05cecf9edd744bec9331cadc03324c417cd0d153f350ebd924cc9
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a malicious redirector link, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains the same URL that is presented as a search result. This suggests the primary goal is to lure the user to a malicious site. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=celebrity+equinox+itinerary+2020+pdf
    • http://files.drydesign.co.uk/uploads/1/3/0/8/130814205/tevurewegukemi.pdf
    • http://files.azzaziel.net/uploads/1/3/0/7/130776826/jasogom.pdf
    • http://files.misslaurasladybugs.com/uploads/1/3/2/6/132680808/784391.pdf
    • http://files.sfsu-sda.com/uploads/1/3/0/7/130775977/1343077.pdf
    • http://files.scotlandmassage.com/uploads/1/3/2/6/132695576/07718446a7.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/fuwonidobi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8758/files/puluno.pdf
    • https://cdn.shopify.com/s/files/1/0432/2033/6802/files/vakulusowo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2604/6362/files/cambodia_history.pdf
    • https://cdn.shopify.com/s/files/1/0435/9946/2558/files/dsm_5_criteria_for_bipolar_disorder.pdf
    • https://cdn.shopify.com/s/files/1/0433/6658/0382/files/91160142812.pdf
    • https://cdn.shopify.com/s/files/1/0430/0544/4259/files/pradhan_mantri_awas_yojana_subsidy_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/6167/3126/files/literidizopelek.pdf
    • https://cdn.shopify.com/s/files/1/0436/1581/3795/files/36673190762.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3627/files/ludulopurevekukug.pdf
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/dakokotofuziduxonal.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_off00009bb0.bin
b86246ebbd21763155c54decdc74f20e3935238900f54373ab6a242abb92e1b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BB0 5472 bytes
font_01_sfnt_off0000ae5c.bin
bbbb6709360db7d1992972baff4ded9c3e991de1bcadb476861f61c306b5feba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE5C 10812 bytes

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