Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8aa298d77bf2162…

MALICIOUS

PDF

36.4 KB Created: 2020-08-15 10:00:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a391c8981d800a4a9ad72767253e474 SHA-1: fb68349a0b00b4f7a3a213478be73298c68eb407 SHA-256: c8aa298d77bf2162db3e82b72b4357d82a509192b6dd5edeac691dda83d43212
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to potentially malicious sites. One critical heuristic identified a link to a known malicious redirector. The document body, though heavily obfuscated, also contains URLs that appear to be part of this link farm, including a direct link to a malicious redirector and several links to Shopify-hosted PDFs.

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/wb?keyword=heladera%20exhibidora%20bambi%20manual
    • http://wikimewaw.pierrepaulbitton.net/uploads/1/3/0/7/130776445/fosivon_sojowesu_tuned.pdf
    • https://cdn.shopify.com/s/files/1/0433/4705/0661/files/assessment_day_verbal_reasoning.pdf
    • https://cdn.shopify.com/s/files/1/0428/5526/8518/files/budget_2020_20_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0441/2948/4952/files/37627800302.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/ethiopian_grade_12_mathematics_textbook_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9029/files/convert_to_word_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0431/9779/2420/files/fuzowezupef.pdf
    • https://cdn.shopify.com/s/files/1/0435/4880/3227/files/7800777200.pdf
    • https://cdn.shopify.com/s/files/1/0438/0209/9873/files/telalizatedeliwuxib.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/first_world_war_history_in_tamil_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/9048/5150/files/garimab.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_off000046c4.bin
c233b8caee61bbfa7b39a1c3ec62caa00b9160b26a57e1be6eba157ed72413c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46C4 5056 bytes
font_01_sfnt_off000057c6.bin
958559135a1e9f9849ba890ea0ddbffb6e1675adacaac5b05042b41fc2834df2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57C6 14232 bytes

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