Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1ea26c218c84cf3…

MALICIOUS

PDF

43.3 KB Created: 2020-08-14 09:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a383e22007284cb6b309c01756f0084 SHA-1: 1601fc1aadef1151c59a07842373b2eeb2674dc0 SHA-256: b1ea26c218c84cf33ec0397efa7066f80541f953284c8738b8bfe2eb3170881c
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, presented under the guise of a study guide, that redirect to malicious infrastructure. The primary redirector URL is https://ttraff.ru/pify?keyword=cbse+guide+for+class+10+physics. The document leverages a link farm technique to distribute these malicious URLs, many of which point to benign Shopify domains but ultimately lead to the malicious redirector.

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=cbse+guide+for+class+10+physics
    • http://files.laurenclarkedesign.com/uploads/1/3/2/7/132740838/e09b4b68890.pdf
    • http://files.freedomk9s.com/uploads/1/3/0/9/130969191/lovavive.pdf
    • http://files.allijoyvazquez.com/uploads/1/3/0/9/130969801/df98bfe8.pdf
    • http://files.nicoleedwardslimited.com/uploads/1/3/0/9/130969639/dfb54201395.pdf
    • http://files.jubileemovement.com/uploads/1/3/2/6/132681670/746040.pdf
    • https://cdn.shopify.com/s/files/1/0439/3644/8667/files/61926087257.pdf
    • https://cdn.shopify.com/s/files/1/0432/5366/1851/files/42789053103.pdf
    • https://cdn.shopify.com/s/files/1/0433/7732/8278/files/sap_enterprise_asset_management_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70339383958.pdf
    • https://cdn.shopify.com/s/files/1/0439/0522/0776/files/45513999843.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2860038855.pdf
    • https://cdn.shopify.com/s/files/1/0434/4997/4946/files/royksopp_remind_me.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0657/files/4753857897.pdf
    • https://cdn.shopify.com/s/files/1/0435/6738/2687/files/38852647643.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_off00006b3a.bin
ec44e980a99ed78e4be75f285e1e4d08bac5c39f45f28683a6dee707db8b5bef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B3A 5756 bytes
font_01_sfnt_off00007ecf.bin
d90d8f10898c823f286fb9586585d948a91e78669a9dba83705fcde7758ad85f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ECF 9848 bytes

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