Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f21bab6ac91ec85…

MALICIOUS

PDF

42.8 KB Created: 2020-08-25 07:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a367916561afc05f691fad259178c00 SHA-1: 8964800f7c7ccbd8efe45286b1f82e13a0cb934c SHA-256: 1f21bab6ac91ec8531602eab913940605a06762c494076106946ef68f9259756
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic match for PDF_MALICIOUS_REDIRECTOR_LINK, pointing to a URL designed to redirect users. The document body, though heavily obfuscated, contains text related to "bandwidth limit exceeded fix" and includes the malicious URL. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are hosted on Shopify. The primary malicious URL is ttraff.ru, which is known for redirecting to 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=megaer+bandwidth+limit+exceeded+fix
    • http://ximovivol.elisabethfuchs.com/uploads/1/3/0/7/130776008/73f8b6b5.pdf
    • http://wizaji.portasuptsblog.org/uploads/1/3/2/3/132303163/8201946.pdf
    • https://cdn.shopify.com/s/files/1/0432/5595/5624/files/wusaretunaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/hodder_cambridge_primary_maths_stage_3.pdf
    • https://cdn.shopify.com/s/files/1/0429/5039/4019/files/kajojovuvazozufivukujuwam.pdf
    • https://cdn.shopify.com/s/files/1/0434/8166/1600/files/applications_of_gis_in_agriculture.pdf
    • https://cdn.shopify.com/s/files/1/0454/3050/5628/files/rekupepulasakafufuwiraba.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84712881745.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/22504055596.pdf
    • https://cdn.shopify.com/s/files/1/0428/9685/1103/files/flip_video_camera_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/5103/0430/files/nezufasisiriluraxu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ab5.bin
ac3e41fa77fce11737c31e789a28b87a4fb3f846cc12ee0ab0cc144a32a9c0ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB5 5240 bytes
font_01_sfnt_off00006c75.bin
db7df783e9d825523287b80e2c126ae2ab0bb518eb7c241d87bb6d4e015d4bfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C75 10576 bytes
font_02_sfnt_off0000908c.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x908C 4324 bytes

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