Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb8485f93c637164…

MALICIOUS

PDF

38.0 KB Created: 2020-08-14 05:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72b1a4b3ec9639d978f22247e3e2102e SHA-1: eda369129dfaba645f089d01dfc80b447f96e3a2 SHA-256: bb8485f93c637164bf2facf6100fec19f35b27ee597130a477c7d68e42691cc9
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic identifying it as a PDF SEO link farm and another flagging a link to known malicious redirector infrastructure. The document body contains garbled text but also includes the URL 'https://ttraff.ru/pify?keyword=kiss+the+rain+sheet', which is flagged as malicious. The presence of numerous links, including to a malicious redirector, suggests an attempt to manipulate search engine results or lead users to harmful content.

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=kiss+the+rain+sheet
    • http://files.stephenlotus.com/uploads/1/3/1/4/131438308/3668112.pdf
    • http://files.yauponberrypress.com/uploads/1/3/2/6/132683463/4986403.pdf
    • http://dopowa.colorphotography.com/uploads/1/3/0/8/130874359/balov.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/zufelarikagawuveki.pdf
    • https://cdn.shopify.com/s/files/1/0433/8404/5719/files/rijurewatuzirijatufa.pdf
    • https://cdn.shopify.com/s/files/1/0455/4008/1829/files/moderate_sedation_guidelines_2017.pdf
    • https://cdn.shopify.com/s/files/1/0440/3852/0997/files/debate_rules_for_college_students.pdf
    • https://cdn.shopify.com/s/files/1/0437/6988/8920/files/65699356192.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4993/files/doxazelibitoxi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/libro_cerebro_de_pan.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/xivadajeguji.pdf
    • https://cdn.shopify.com/s/files/1/0438/6678/3904/files/actitudes_positivas_y_negativas_en_el_trabajo.pdf
    • https://cdn.shopify.com/s/files/1/0451/3293/9429/files/envision_math_6th_grade_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/vexolipawe.pdf
    • https://cdn.shopify.com/s/files/1/0432/1322/6139/files/zujamepurigukatenukubupo.pdf
    • https://cdn.shopify.com/s/files/1/0436/7391/1449/files/logitech_m325_driver.pdf
    • https://cdn.shopify.com/s/files/1/0432/4117/7248/files/jquery_1._7_2.pdf
    • https://cdn.shopify.com/s/files/1/0435/2812/6618/files/murir.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_off000058f9.bin
c0b8795d24534076aaedc71c3cca38ef6148134d5a17ba0fc667c93312f46213
pdf-font-stream PDF embedded font (sfnt) at offset 0x58F9 4712 bytes
font_01_sfnt_off000068ec.bin
0d95bcfe1c021d5d33358b3ca81e1734d5fadd8845f06db7d7fba9937f2539b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x68EC 10092 bytes