Malicious PDF — malware analysis report

Static analysis result for SHA-256 98ad377a3a2df700…

MALICIOUS

PDF

40.5 KB Created: 2020-08-20 21:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1debc41a5d2eb80e48fa64620fcd6ba9 SHA-1: 7c90069257da0b281806232e93291fe91633e594 SHA-256: 98ad377a3a2df70012be58547c08ddf75663886aaf247d4a942de8617ad672c1
130 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=free+party+invitations+templates+for+birthdays', is designed to lure users with a seemingly benign offer. The document also exhibits characteristics of a link farm, embedding numerous external PDF links, many of which point to Shopify domains. The primary malicious link is the highest priority IOC.

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=free+party+invitations+templates+for+birthdays
    • http://nimogemu.blendedlearningpd.com/uploads/1/3/0/8/130814124/gobanalurop.pdf
    • http://kabow.piolkdesign.com/uploads/1/3/0/7/130739423/naxizefatipuvev.pdf
    • http://jatiwofev.demonjardin.com/uploads/1/3/1/3/131398560/6352350.pdf
    • https://cdn.shopify.com/s/files/1/0434/8094/0710/files/16_8_intermittent_fasting_guide_nhs.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38684703775.pdf
    • https://cdn.shopify.com/s/files/1/0438/1261/8402/files/bazaar_app_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/3407/5558/files/mezijuzidekumufemus.pdf
    • https://cdn.shopify.com/s/files/1/0462/0075/0243/files/12203151103.pdf
    • https://cdn.shopify.com/s/files/1/0429/2539/2035/files/15993906571.pdf
    • https://cdn.shopify.com/s/files/1/0431/7665/7051/files/rudes.pdf
    • https://cdn.shopify.com/s/files/1/0436/4717/2768/files/zibogovawefefejimafitebi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3649/2444/files/malayala_manorama_news_paper_today_malappuram.pdf
    • https://cdn.shopify.com/s/files/1/0435/8920/6174/files/excel_vba_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/6441/6661/files/aeronautical_engineering_ebooks_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/4063/5042/files/sass_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/8462/7614/files/20140821854.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_off000060b7.bin
a1b64eb8f846ab255ad81d85fc97174d36eb4743d1975d8505cbfcd6ad89dddb
pdf-font-stream PDF embedded font (sfnt) at offset 0x60B7 5540 bytes
font_01_sfnt_off0000735b.bin
a905d427d248b4ddd4f7fc7c11e88415806c4cbfbf0e2a83a9c7b5a2dd3eb197
pdf-font-stream PDF embedded font (sfnt) at offset 0x735B 9912 bytes