Malicious PDF — malware analysis report

Static analysis result for SHA-256 99b01606a89903a0…

MALICIOUS

PDF

41.1 KB Created: 2020-08-13 23:55:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1b822cfb4784af94aa94f2e50ddcf73 SHA-1: b526684fe7068a45c471b99681ca5253d6d57f0c SHA-256: 99b01606a89903a0b301390f771e6bb01ec2eabb4d4f5f30e2ac96f241a5426b
162 Risk Score

Malware Insights

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

The PDF file contains a social engineering lure, instructing the user to install a browser extension or update to view content. It embeds numerous links, with the primary link redirecting through a known malicious redirector to a link farm hosted on Shopify. The document body, though heavily obfuscated, contains the malicious redirector URL and several other PDF links, indicating a likely attempt to drive traffic to malicious sites or download further payloads.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/pify?keyword=mailing+list+google+doc+template
    • http://kagiz.trafletfabian.com/uploads/1/3/2/8/132814930/kukepij-lepabevufuvi-navekagixa-punazosinukuvi.pdf
    • http://tonapapu.threeaineconsultancy.com/uploads/1/3/1/4/131406950/2703618.pdf
    • http://files.sweetbrookfarms.com/uploads/1/3/1/3/131379343/metutoxitilez.pdf
    • http://files.it-ninja.nl/uploads/1/3/1/4/131408204/nudasetoler.pdf
    • https://cdn.shopify.com/s/files/1/0433/3427/1126/files/vuburaropawotegajejapele.pdf
    • https://cdn.shopify.com/s/files/1/0433/8312/8214/files/nugiviwufewub.pdf
    • https://cdn.shopify.com/s/files/1/0447/9103/8118/files/apex_reading_test_3_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/11449510202.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8841/files/59351382383.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7985/files/doruxoluwizuwemajujoxotox.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4977/files/89846067381.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/wazaxojugorav.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/interview_questions_and_answers_for_customer_service.pdf
    • https://cdn.shopify.com/s/files/1/0432/1152/2209/files/zasonamoxiwogal.pdf
    • https://cdn.shopify.com/s/files/1/0433/7264/2454/files/all_of_me_piano_sheet_music_with_notes.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/39806257069.pdf
    • https://cdn.shopify.com/s/files/1/0435/4945/8591/files/50346246931.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_off00006220.bin
7daddeafaa359eb021688da585598eebb5c56f7f4c7bf3049542b3a478b4a8e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6220 5304 bytes
font_01_sfnt_off00007417.bin
1f530e8518072962f71366df47a25d85b3aebad377bdfb9ab42b7416dc736ac7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7417 10452 bytes