Malicious PDF — malware analysis report

Static analysis result for SHA-256 f386119358e8c30a…

MALICIOUS

PDF

41.0 KB Created: 2020-08-12 15:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe6197ec97011e79c76336fe22374fa8 SHA-1: 509dc10c5c95c7bfdceb22de6a02c11f2d5a6376 SHA-256: f386119358e8c30a74807290b2ab3387e034f9fc0e1f0c13ee8de056f39890b4
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the text 'Cognitive theory of emotion pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF also contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, which are likely part of a link farm to improve search engine ranking for malicious content.

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.cc/wb?keyword=cognitive%20theory%20of%20emotion%20pdf
    • http://files.howlinghillsranch.com/uploads/1/3/2/7/132740352/bonikuso.pdf
    • http://files.voiceofgreg.com/uploads/1/3/1/4/131437005/jitinigaxebefowo.pdf
    • http://files.rayslicenseplates.com/uploads/1/3/1/0/131070912/9af1da1ba57d.pdf
    • http://files.sharkteamone.com/uploads/1/3/1/0/131070192/daridepuwul_fanamiso_guzigojomo_zapebojejib.pdf
    • http://files.automature.com/uploads/1/3/0/7/130775554/vupelavemukatefobe.pdf
    • https://cdn.shopify
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/39956312050.pdf
    • https://cdn.shopify.com/s/files/1/0433/6120/6422/files/tonubowukozumurawuzil.pdf
    • https://cdn.shopify.com/s/files/1/0450/1933/2766/files/electronic_devices_and_circuits_objective_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/7755/8681/files/pisulidipetemimubumowe.pdf
    • https://cdn.shopify.com/s/files/1/0437/6127/0935/files/ode_to_joy_violin.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/jugereruli.pdf
    • https://cdn.shopify.com/s/files/1/0429/9027/2675/files/acceptance_definition.pdf
    • https://cdn.shopify.com/s/files/1/0437/6503/9261/files/kanunuxopidojodugiduw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91960476686.pdf
    • https://cdn.shopify.com/s/files/1/0440/2679/0053/files/angeles_y_demonios_google_drive.pdf
    • https://cdn.shopify.com/s/files/1/0438/3349/1613/files/basic_principles_of_cost_accounting.pdf
    • https://cdn.shopify.com/s/files/1/0434/0583/6438/files/troy_bilt_super_tomahawk_chipper_shredder_manual.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_off00006434.bin
c881c19f57b7804096de4820b3aa35e6a525ac8144a725d934a6b5dddc518bdb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6434 5104 bytes
font_01_sfnt_off00007575.bin
1f833c830425e6a184bb555f2344b8b57b161cf83811350cbebb8a0a9a953917
pdf-font-stream PDF embedded font (sfnt) at offset 0x7575 9900 bytes