Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a810288bce44234…

MALICIOUS

PDF

44.3 KB Created: 2020-08-18 22:17:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2a74a2fc9a0d3ab53a4188f50340611 SHA-1: ca3768aa1cea3caf7eacf4621ad5d4c7e9a9cb75 SHA-256: 8a810288bce442345907880af4e4b5047857917bbaf923081b68ecdd1ba2b01b
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=wondershare+pdf+editor+3.+9.+11.+9'. This indicates the document is designed to redirect users to malicious infrastructure. Additionally, a PDF link farm heuristic suggests the document is part of a larger SEO poisoning effort to distribute malicious files. The presence of a 'download button' lure further supports the malicious intent. The document body, though heavily obfuscated, contains the redirector URL and several benign-looking Shopify URLs, likely used to mask the malicious activity.

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.
  • 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.cc/pify?keyword=wondershare+pdf+editor+3.+9.+11.+9
    • http://files.twobitranchphotography.com/uploads/1/3/1/3/131397973/nupiradofarivo.pdf
    • http://files.blackmtnbengals.com/uploads/1/3/2/6/132681836/9404954.pdf
    • http://files.lilianholm.com/uploads/1/3/2/7/132740515/c4adf7fe267.pdf
    • http://files.eiotown.com/uploads/1/3/0/7/130739155/pomezubeg.pdf
    • http://files.barrygjohnsonsr.com/uploads/1/3/0/7/130739379/dce28.pdf
    • https://cdn.shopify.com/s/files/1/0444/7302/4679/files/application_letter_for_the_post_of_security.pdf
    • https://cdn.shopify.com/s/files/1/0433/1975/4907/files/32546087768.pdf
    • https://cdn.shopify.com/s/files/1/0428/4288/2215/files/39933098342.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/88746914133.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3110/files/zidevivovezapijakav.pdf
    • https://cdn.shopify.com/s/files/1/0436/2970/7422/files/66046537075.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8176/files/dejizaxabutigat.pdf
    • https://cdn.shopify.com/s/files/1/0438/5128/4642/files/how_to_make_a_sea_lantern.pdf
    • https://cdn.shopify.com/s/files/1/0435/1043/1896/files/angina_disease.pdf
    • https://cdn.shopify.com/s/files/1/0432/1977/9741/files/11495061470.pdf
    • https://cdn.shopify.com/s/files/1/0428/6113/3990/files/juxusarixux.pdf
    • https://cdn.shopify.com/s/files/1/0437/8116/1121/files/japanese_opposite_words_list.pdf
    • https://cdn.shopify.com/s/files/1/0434/4401/1168/files/40610396422.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_off0000603e.bin
3ee9057f5541b3affccf979082157cbe8094d40a208c8d639f1190d60d1502f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x603E 5300 bytes
font_01_sfnt_off00007247.bin
906ea598bcdb56fa9385d7dbca5516c92a31928e73d92b2dbcb50f89b0900687		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7247 10420 bytes
font_02_sfnt_off000095ec.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95EC 4324 bytes

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