Malicious PDF — malware analysis report

Static analysis result for SHA-256 48484b450bb41c7d…

MALICIOUS

PDF

66.7 KB Created: 2020-08-21 01:23:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffc395be8dd45e4cf4b459825696c005 SHA-1: f52a4f81d52aade9f83c8f75b0c35f4eefdc792f SHA-256: 48484b450bb41c7d9b3618d1f41ef315037ee7b7fa3062f02bb1c861ca9228c8
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to known malicious infrastructure. Additionally, PDF_SEO_LINK_FARM indicates a link farm of 28 external PDF documents, with the primary host being cdn.shopify.com. The document body, though heavily obfuscated, contains the malicious URL and appears to be generated by wkhtmltopdf, suggesting a programmatic approach to creating the lure.

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=reformed+baptismal+regeneration
    • http://files.nevacochranrd.com/uploads/1/3/0/7/130776791/gapevinozesoze_giganimon_tosugizufe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bararilisubolubudikolumo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9715/1904/files/troy_bilt_super_tomahawk.pdf
    • https://cdn.shopify.com/s/files/1/0429/7107/0617/files/bilogifavasukusoba.pdf
    • https://cdn.shopify.com/s/files/1/0438/4312/5405/files/gemikomotowopaxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8049/9879/files/autumn_leaves_chord_melody_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0430/9286/9281/files/80453890027.pdf
    • https://cdn.shopify.com/s/files/1/0435/1560/9252/files/weather_in_bradford_pa.pdf
    • https://cdn.shopify.com/s/files/1/0432/3534/4539/files/benim_hocam_corafya_video_ders_notlar_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/4891/8440/files/34011221648.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6542/files/algoritmo_aes.pdf
    • https://cdn.shopify.com/s/files/1/0427/4470/9276/files/kefidiletizenanego.pdf
    • https://cdn.shopify.com/s/files/1/0427/9799/0055/files/wipivetef.pdf
    • https://cdn.shopify.com/s/files/1/0431/4634/6658/files/18640784983.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_off0000c858.bin
fc0e1769d8c10b55be06a7fe999817f638b13c57fac961bbb1d2a614be2f63d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC858 5508 bytes
font_01_sfnt_off0000dafa.bin
524b7ffa709a47fb8d5de35f772b355dce11b1667687354c29cdc52ecf5c2e9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFA 10408 bytes

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