Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bd890cf4402bb7e…

MALICIOUS

PDF

33.5 KB Created: 2020-08-21 02:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f49da1ac15b31d0211477461a2ff344e SHA-1: 78f2b6256e4399cc26060ec59d479751e8cd8423 SHA-256: 3bd890cf4402bb7e69863d29ad9a868b9498469cb20cd7288bf38e1438be0d8f
140 Risk Score

Malware Insights

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

The PDF document contains a link farm and a malicious redirector URL, suggesting it is designed to lead users to malicious content. Additionally, a callback phishing lure is present, indicating a social engineering attempt to solicit a phone call. The document body's content, 'Wallpaper hd for mobile love', is likely a lure to disguise the malicious intent. No scripts were extracted, limiting the analysis of direct payload execution.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=wallpaper+hd++for+mobile+love
    • http://files.maplegroveiowa.org/uploads/1/3/0/8/130813769/98a07aaf2cc0.pdf
    • http://files.changinglyfemgmt.com/uploads/1/3/1/4/131437378/duxakawudenus.pdf
    • http://files.hcnextdesign.com/uploads/1/3/2/6/132681617/5280936.pdf
    • http://files.afripeace.org/uploads/1/3/2/7/132740343/7307267.pdf
    • https://cdn.shopify.com/s/files/1/0430/1137/5267/files/bawawovakerodisefin.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wonazonuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/bucharest_city_map.pdf
    • https://cdn.shopify.com/s/files/1/0438/9090/1144/files/69874347534.pdf
    • https://cdn.shopify.com/s/files/1/0428/4029/3543/files/31524428887.pdf
    • https://cdn.shopify.com/s/files/1/0446/1504/1187/files/corporate_bylaws_rumah_sakit.pdf
    • https://cdn.shopify.com/s/files/1/0460/1911/7223/files/sophos_central_endpoint_protection_advanced_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/2515/3698/files/ocean_avenue_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2088/files/android_navigation_with_bottomnavigationview.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_off00004618.bin
bd995930380d570d33401a062923f56cc9bf0133affc90c2b30c5ed40cc8dc78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4618 5316 bytes
font_01_sfnt_off0000581c.bin
9303555f9dd5fb61ba43e1f49ea5195ee170e227b2e142549ff816c6e0572336		 pdf-font-stream PDF embedded font (sfnt) at offset 0x581C 9844 bytes

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