Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7f656d47424ea21…

MALICIOUS

PDF

54.7 KB Created: 2020-08-17 16:02:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8cf0055b1200ad5e9e3ff8344caf3ea5 SHA-1: 8872483b5126dc5b702828c7676a2e5858c82681 SHA-256: f7f656d47424ea2113b30acbf33ed9d3f66bd2f0744ded98bf1e857bd9a1ebbd
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=expanding+double+brackets+surds+worksheet'. This URL is presented within the document body, suggesting a social engineering lure to trick the user into clicking it. The file also exhibits characteristics of a link farm, with numerous external PDF links, further supporting a malicious intent to redirect users to potentially 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=expanding+double+brackets+surds+worksheet
    • http://files.sasbirdclub.com/uploads/1/3/1/3/131382406/2884174.pdf
    • http://files.aging-success.com/uploads/1/3/1/0/131069812/fumapodepidi-duzuju-favele.pdf
    • http://files.powermilers.org/uploads/1/3/2/6/132680827/sakosemonatimozo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8561/8583/files/35128604981.pdf
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/open_source_church_management_software.pdf
    • https://cdn.shopify.com/s/files/1/0429/8119/5927/files/love_on_the_brain_saxophone_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0438/0947/2669/files/32409890761.pdf
    • https://cdn.shopify.com/s/files/1/0430/1606/1091/files/lijajatinowamimivede.pdf
    • https://cdn.shopify.com/s/files/1/0430/8857/6661/files/21531511345.pdf
    • https://cdn.shopify.com/s/files/1/0427/9861/2636/files/netawajuzomidixe.pdf
    • https://cdn.shopify.com/s/files/1/0436/9471/9131/files/nesufilowarerejavazoves.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1028728638.pdf
    • https://cdn.shopify.com/s/files/1/0433/5206/4155/files/python_book_for_advanced_programmers.pdf
    • https://cdn.shopify.com/s/files/1/0435/4244/6231/files/remote_front_end_developer_jobs.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/18803656753.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/
    • https://cdn.shopify.com/s/files/1/0429/8119/5927/files/love_on_the_brain_saxophone_sheet_music

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008072.bin
5c9dff0cdac2648e644934d0b3fdc5e5cc08a00f46fa70c2f7858324f67b1459
pdf-font-stream PDF embedded font (sfnt) at offset 0x8072 5540 bytes
font_01_sfnt_off0000934a.bin
afcaa01679eafc4edf58dae5467c22bb1360e6d582b28dc5b1bb15647d28330e
pdf-font-stream PDF embedded font (sfnt) at offset 0x934A 14132 bytes
font_02_sfnt_off0000bf6b.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF6B 4324 bytes