Malicious PDF — malware analysis report

Static analysis result for SHA-256 f73d4a99c96dba88…

MALICIOUS

PDF

41.2 KB Created: 2020-08-18 21:13:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77eeee3fd2b852cac6e132934e7355c0 SHA-1: 7e031545db38f34e53c5eb0cdc8baf98ce1c998e SHA-256: f73d4a99c96dba88f851fb8d061669bc3b7ffc6113bdce40d79a88184f92f498
168 Risk Score

Malware Insights

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

The PDF contains a lure for downloading an application, indicated by the 'SE_DOWNLOAD_BUTTON' heuristic and the document body text. It also contains a strong 'SE_MFA_LURE' heuristic, suggesting credential harvesting or MFA abuse. The 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic points to a malicious redirector URL, 'https://ttraff.ru/pify?keyword=aplikasi+whatsapp+plus+6.+70', which is likely the initial stage of the attack. The 'PDF_SEO_LINK_FARM' heuristic indicates a large number of embedded links, with 'https://cdn.shopify.com/s/files/1/0430/3316/5986/files/71197309823.pdf' being the first listed.

Heuristics 5

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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=aplikasi+whatsapp+plus+6.+70
    • http://files.laxcoworking.com/uploads/1/3/1/0/131070284/11efc976d2.pdf
    • http://files.fusionpipeexperts.com/uploads/1/3/0/9/130969497/kuvetakas.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/71197309823.pdf
    • https://cdn.shopify.com/s/files/1/0432/1764/9819/files/articles_with_geographical_names_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/5787/2033/files/bokukatuxewevoduvepuvip.pdf
    • https://cdn.shopify.com/s/files/1/0437/8371/7015/files/58237944554.pdf
    • https://cdn.shopify.com/s/files/1/0428/9629/4051/files/piriformis_syndrome_muscle_test.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3089/files/braveheart_piano_notes.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/disney_annual_report_2015.pdf
    • https://cdn.shopify.com/s/files/1/0430/0495/2735/files/37307575950.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/55252267877.pdf
    • https://cdn.shopify.com/s/files/1/0436/2534/9283/files/zerenanigipivevivelubu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6354/1917/files/debbie_harry_face_it.pdf
    • https://cdn.shopify.com/s/files/1/0438/6498/1664/files/form_disable_autocomplete.pdf
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/58406745402.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/28202272522.pdf
    • https://cdn.shopify.com/s/files/1/0431/1079/3382/files/tironi.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_off00006351.bin
80b845d8885f5822557d33836eefd8a9da0d652ecd17aad5c59d60c3555c5a86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6351 5364 bytes
font_01_sfnt_off0000759f.bin
931d106ef0a154e95e38109f09a0aa5a1505e6a2ed34e7725a683cebc72d46c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x759F 10048 bytes

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