Malicious PDF — malware analysis report

Static analysis result for SHA-256 922177698cb8c2e8…

MALICIOUS

PDF

80.1 KB Created: 2020-08-23 12:41:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02d0f672ee3bde9b243d0e7810aaa609 SHA-1: 42b57aef94cd76e19103d926df79ae988ef7bf3d SHA-256: 922177698cb8c2e81ecb338fb75fa846a82b36e2033cb707ae8b819c28dd4baf
128 Risk Score

Malware Insights

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

The PDF file contains numerous links to external resources, a common tactic for SEO poisoning or redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. The presence of a 'download button' lure further supports a phishing or redirection attack pattern.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=attitude+magazine+thailand+pdf+free
    • http://kanowo.gdcus.org/uploads/1/3/1/4/131453574/2443058.pdf
    • http://gujemisos.sanantoniosalsaon2.com/uploads/1/3/1/1/131164250/82b3af18.pdf
    • https://cdn.shopify.com/s/files/1/0428/1729/0407/files/seinfeld_season_9.pdf
    • https://cdn.shopify.com/s/files/1/0436/0041/2835/files/advanced_java_multiple_choice_questions_and_answers_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/5731/4977/files/ecology_and_palaeoecology_of_benthic_foraminifera.pdf
    • https://cdn.shopify.com/s/files/1/0434/1671/5429/files/mamejemawufuvagafaseke.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4280/files/sql_server_management_studio_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/2153/1293/files/allen_bradley_micrologix_1400_plc.pdf
    • https://cdn.shopify.com/s/files/1/0430/4204/6103/files/30240119613.pdf
    • https://cdn.shopify.com/s/files/1/0431/3314/1146/files/nuxidokidabexipofapuz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000e1d7.bin
06902aa18e1ceb83f2444dd63dcc1996f1d40b0bf696afe98e96872c9adbebe5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE1D7 11732 bytes
font_00_sfnt_off0000cffb.bin
7c71372f56ae7183e0200df875fb4471bd98b9b3f9b0b26a2c811ac857aa4f50		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFB 5316 bytes
font_02_sfnt_off00010333.bin
b68d4a51f430f326c9eacc153ad72208436801a99a46422a04c6688bbb94d6fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10333 14996 bytes

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