Malicious PDF — malware analysis report

Static analysis result for SHA-256 911192bfff110d96…

MALICIOUS

PDF

97.6 KB Created: 2020-09-05 22:05:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f8c95817aaaea1c7e1b0543834d5ea5 SHA-1: 7838b976824575525c98b69f3444b2139281ce8b SHA-256: 911192bfff110d96d4abc989e3aa00ee89b659687df56dcd86bf919cb52a762c
120 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to a known malicious domain, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to spreadsheet software and the malicious URL, suggesting a social engineering lure. The PDF_SEO_LINK_FARM heuristic indicates the PDF is part of a larger link farm, likely for SEO manipulation or to distribute malicious 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=important+features+of+spreadsheet+software
    • https://static.usrfiles.com/ugd/eaf48f_9737830f96ec4819a3b4a33e6222b8e6.pdf
    • https://static.usrfiles.com/ugd/8a419d_3f04a17e064b45fabc27ef5bef360b7b.pdf
    • https://static.usrfiles.com/ugd/03ae60_4b59d94f722340959a0857982bb43172.pdf
    • https://static.usrfiles.com/ugd/60e703_b69892a1a9e34cd68805c626de76a648.pdf
    • https://cdn.shopify.com/s/files/1/0462/2765/2759/files/cat_430d_backhoe_parts_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/7285/4939/files/remove_all_breakpoints_android_studio_shortcut.pdf
    • https://cdn.shopify.com/s/files/1/0434/5374/3270/files/mano_buddhi_ahankara_chitta_ninaham.pdf
    • https://cdn.shopify.com/s/files/1/0434/8048/1954/files/english_grammar_book_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3581/files/27361877373.pdf
    • https://cdn.shopify.com/s/files/1/0433/2450/6266/files/piruses.pdf
    • https://cdn.shopify.com/s/files/1/0436/6827/5353/files/dagigewez.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_off00013754.bin
d69a3870bb21bc748ab2dbe55f13121218ab8526971a6c18dbce3dfa856b311c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13754 5276 bytes
font_01_sfnt_off00014928.bin
6b629c503b8e57db711350c9e57eea690a8050bd25e8c1824623a6e93ce0f412		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14928 15268 bytes

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