Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b739e2b0ac5e7b6…

MALICIOUS

PDF

41.9 KB Created: 2020-08-31 17:18:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74963f7fc0c855e311b429f13c496556 SHA-1: 01ce02ece1c778e7baf1ddb5a31864e6849be605 SHA-256: 1b739e2b0ac5e7b683e3e8e8309dac7f68cdea2c682dcde588b963d04931dd20
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it contains links to known malicious redirector infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic fired, noting a large number of embedded external links. The primary malicious URL identified is https://ttraff.ru/pify?keyword=gamesir+m2+android, which likely serves as the initial point of compromise. 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/pify?keyword=gamesir+m2+android
    • https://static.usrfiles.com/ugd/4c76bf_bcc32a42153e410aaebea981c180434d.pdf
    • https://static.usrfiles.com/ugd/eb6612_4b707ae9f3774e1d8deb6f134fdb1f02.pdf
    • https://static.usrfiles.com/ugd/834936_bc2d7d179f75475085b2ce2623e6896a.pdf
    • https://cdn.shopify.com/s/files/1/0451/1550/6853/files/25360203758.pdf
    • https://cdn.shopify.com/s/files/1/0433/7156/1116/files/52171857830.pdf
    • https://cdn.shopify.com/s/files/1/0434/5354/6656/files/maths_olympiad_for_class_1_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1764/files/71739544540.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_73a992966dcb475385d3b4b8867d4a8d.pdf
    • https://static.usrfiles.com/ugd/122077_30500ba4267a482b8c113a47bbcd5a73.pdf
    • https://static.usrfiles.com/ugd/b8c837_ff482b99a2044902bd9b5e8ca62e7d65.pdf
    • https://static.usrfiles.com/ugd/d3758e_0ae4278ebd104ef88e5c7b06e9233ee4.pdf
    • https://static.usrfiles.com/ugd/b8c837_2be55c7e8b444c1fa019757a913632e9.pdf
    • https://static.usrfiles.com/ugd/b8c837_69474a4c75ad4a7082ffc3506eac9552.pdf
    • https://static.usrfiles.com/ugd/b8c837_4ad074537707482d9ef2dda3d167778b.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_off00005df9.bin
0967540f27a26c90ab9bc3d2230c890965b71317780929190b069341b412ebad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF9 5104 bytes
font_01_sfnt_off00006f3f.bin
1c6d27cc74be8add46ad4aee2893ab0dfe43bc8a6d1d820f765f4e26912cff17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3F 15832 bytes

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