Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc10f44f1cdac0fe…

MALICIOUS

PDF

48.3 KB Created: 2020-08-21 04:58:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 809d5974faf6db03a2b4c8ed4b7a6753 SHA-1: ea11823b1d52df5016e912e614a3923f8d23952c SHA-256: dc10f44f1cdac0fe85ef3b20c24bb434ed5a744e2af3bd648291523d9641c731
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a reference to the same malicious URL. The presence of a link farm heuristic further suggests an attempt to manipulate search engine results or distribute malicious content through numerous seemingly legitimate-looking PDF files hosted on platforms like Shopify. The primary malicious URL is https://ttraff.ru/pify?keyword=color+by+number+addition+worksheets+for+kindergarten.

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.ru/pify?keyword=color+by+number+addition+worksheets+for+kindergarten
    • http://files.icollectablesonline.com/uploads/1/3/2/6/132682790/supojofirajoli.pdf
    • http://gijavuro.totalbusinesswebsitesolutions.com/uploads/1/3/0/7/130739892/ziwimewo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3536/8346/files/84830216790.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/74823692351.pdf
    • https://cdn.shopify.com/s/files/1/0429/0750/0711/files/akreditasi_prodi_ban_pt.pdf
    • https://cdn.shopify.com/s/files/1/0435/8465/1423/files/virginia_state_inspection_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/5397/3657/files/small_letter_alphabet_tracing.pdf
    • https://cdn.shopify.com/s/files/1/0432/4294/6728/files/gyrocopter_dota_2_guide_2018.pdf
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/81197208673.pdf
    • https://cdn.shopify.com/s/files/1/0432/7745/1428/files/console_commands_dragon_age_origins.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
font_00_sfnt_off00006f84.bin
d897a8c5f2c7c46619bb0cb5f3cbd0f1e53c2602424fde720669ba8f1d659255		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F84 5624 bytes
font_01_sfnt_off0000828b.bin
6a42e0c24da304ce720cb7535b3d4e6be686ac790d4253cf1d9bf58821d0e782		 pdf-font-stream PDF embedded font (sfnt) at offset 0x828B 10352 bytes
font_02_sfnt_off0000a5f5.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5F5 4324 bytes

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