Malicious PDF — malware analysis report

Static analysis result for SHA-256 307603bbb6572fa3…

MALICIOUS

PDF

44.6 KB Created: 2020-08-12 20:44:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7de1500ce90b12804f7c7a50987766b1 SHA-1: 401e0140aa53d5b4bbeb7432d92eda6c90075747 SHA-256: 307603bbb6572fa382fb71f33babc4f8de6b04c486bab3e7754ad2f6c2f41a53
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to a redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wb?keyword=write%20on%20pdf%20apk%20android', indicating a lure related to PDF manipulation on Android. This suggests the document is designed to redirect users to malicious content or downloads.

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=write%20on%20pdf%20apk%20android
    • http://files.retrodollseurope.com/uploads/1/3/1/3/131398066/8ff2a2a.pdf
    • http://xupunibep.westspringfieldbouncehouserentals.com/uploads/1/3/0/8/130873851/kafadosavebixi.pdf
    • http://files.deadmeatband.com/uploads/1/3/0/8/130814676/welapuguz.pdf
    • https://cdn.shopify.com/s/files/1/0430/9286/9281/files/91345711493.pdf
    • https://cdn.shopify.com/s/files/1/0432/5287/5424/files/algoritmo_rsa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/free_web_design_course.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/98626893209.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/64260519361.pdf
    • https://cdn.shopify.com/s/files/1/0429/9948/0473/files/62085272771.pdf
    • https://cdn.shopify.com/s/files/1/0435/0954/7174/files/mamat.pdf
    • https://cdn.shopify.com/s/files/1/0427/8353/9366/files/cambridge_igcse_english_lesson_plans.pdf
    • https://cdn.shopify.com/s/files/1/0434/2562/8316/files/ai_for_game_developers.pdf
    • https://cdn.shopify.com/s/files/1/0432/7089/7824/files/mubakorugosivedo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8387/files/25009272594.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005126.bin
c2da8f7ea546b9ab1673fc03cf322b62eb54d8c0919339a5e63ae0470e5aaaf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5126 3028 bytes
font_01_sfnt_off00005bef.bin
0261f26aec13d778b33796b1288231596fcda3047d8442e87f39169de93143ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BEF 4904 bytes
font_02_sfnt_off00006cc0.bin
49159daba24b82eabb01f2007cfe9c1351f65c3563efbaa0077757adbc53a84c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC0 10080 bytes
font_03_sfnt_off00008f83.bin
5663d8578250f824917609d3eb76e3efe1318610afd7b77be9e2258255c4b957		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F83 16296 bytes

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