Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c9cfb839dacd99b…

MALICIOUS

PDF

46.0 KB Created: 2020-08-30 15:38:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 794a64ff14ed2dda5883c1d206920ff6 SHA-1: fb49616b98a2fe2b850bfdd94aad0bad303724b0 SHA-256: 2c9cfb839dacd99b7ca9c8bb80516e0848fdd839a572af3ded4110c5a66e74ef
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=download+nasa+video'. This URL is presented within the document body, suggesting a social engineering lure to trick users into downloading further content. The file also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify and static.usrfiles.com, though the primary malicious indicator is the redirector. No scripts were extracted from this sample.

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/wix?keyword=download+nasa+video
    • https://cdn.shopify.com/s/files/1/0434/4872/9766/files/hetalia_axis_powers_english_dubbed.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/gimoxaxivazevivoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/3507/4465/files/missing_411_ebook.pdf
    • https://cdn.shopify.com/s/files/1/0431/9592/4640/files/51716204224.pdf
    • https://cdn.shopify.com/s/files/1/0435/3864/5144/files/anabolisme_des_protines.pdf
    • https://static.usrfiles.com/ugd/b8c837_09714c9640e64a18a20a9b21644430a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_73bd2cffd2074b3da95b4760d81bd000.pdf
    • https://static.usrfiles.com/ugd/067ecb_914232f19ea84006a4c1223a556beed5.pdf
    • https://static.usrfiles.com/ugd/7ff653_45cfb8b9331b4b1ba9b0a1e28371d9d3.pdf
    • https://static.usrfiles.com/ugd/b8c837_42717236b40443d0974665c2105e88a0.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad319baeaa3f4a14b46fe1e02621a7ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_895bc1339dad4deebd748217b346c316.pdf
    • https://static.usrfiles.com/ugd/c63dba_05103d7cc1af4027b65203863434266d.pdf
    • https://static.usrfiles.com/ugd/b65acf_8b5e7e2ce13745cba176f51d917685b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c858a73eb3447a9b3c756bf73a9a67f.pdf
    • https://static.usrfiles.com/ugd/b8c837_7877b9763f2e40b19743e642d20e898c.pdf
    • https://static.usrfiles.com/ugd/63022f_62636d63d74e4ea99e5555e48b6eecd6.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_off0000769a.bin
c79c340513fe622144ca620989177c07ca2958d77dddc3d3d3131ecbd9be5d9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x769A 4876 bytes
font_01_sfnt_off0000875b.bin
87b81aa2bcfe700722259d9504e0110f3422f2a469d9df32fe4685ab7d9f80ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x875B 10620 bytes