Malicious PDF — malware analysis report

Static analysis result for SHA-256 98d050cd042c11cd…

MALICIOUS

PDF

49.4 KB Created: 2020-08-31 01:51:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 649f3d35cf48f0033525f2c8662107c7 SHA-1: 7dcae36dfbbd4560bd9a97553fb9a1901635e1d2 SHA-256: 98d050cd042c11cda7922ab20dd4a6343bacdb2d517558333d564bfbaf459eb2
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to PDF files hosted on Shopify. One of these links, 'https://ttraff.ru/wix?keyword=os+crimes+da+rua+morgue+edgar+allan+poe', is identified as a malicious redirector. This suggests a link farm or SEO poisoning attack designed to lure users to malicious infrastructure. No scripts were extracted, and the document body was heavily obfuscated.

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=os+crimes+da+rua+morgue+edgar+allan+poe
    • https://cdn.shopify.com/s/files/1/0447/8484/4966/files/45951908446.pdf
    • https://cdn.shopify.com/s/files/1/0456/4661/0599/files/vofedijazegudewelajobosu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7941/7504/files/fuvoxexuwodikiwoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/5523/4710/files/regasujez.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/chaos_rune_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0432/8439/8244/files/lewakovud.pdf
    • https://cdn.shopify.com/s/files/1/0428/9937/4233/files/72214985971.pdf
    • https://cdn.shopify.com/s/files/1/0430/4050/6009/files/sap_crystal_reports_versions.pdf
    • https://cdn.shopify.com/s/files/1/0433/9059/9319/files/nuxug.pdf
    • https://cdn.shopify.com/s/files/1/0430/8982/1845/files/zotatotobevanusafez.pdf
    • https://cdn.shopify.com/s/files/1/0436/5841/2185/files/ood_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0433/3663/0422/files/wesujezefunapisibisulurig.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8971/files/wuripeg.pdf
    • https://cdn.shopify.com/s/files/1/0437/2417/7557/files/46967922221.pdf
    • https://cdn.shopify.com/s/files/1/0428/7243/8947/files/34018288485.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_off00008380.bin
f6c6bbae60da5eae3f254d62e97c52c32c66bd590282297cf8bd21de3ba2882e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8380 5420 bytes
font_01_sfnt_off000095cb.bin
01a140d1061af8e20169560b672a70f3dd7a1856468be48c500dda83fa8ce7b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95CB 10276 bytes

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