Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e236cc80c6f9135…

MALICIOUS

PDF

43.1 KB Created: 2020-08-18 20:19:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4912c48e9eeb3f33a75415c5be5a7f1c SHA-1: 975b242cbef76478c5ccd487ad7e6fb1d1c15eef SHA-256: 3e236cc80c6f91352c571cf8988abd20013082c435754869484edb66d82dce3c
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=the+nullification+crisis+student+worksheet+answer+key', is designed to redirect users to potentially harmful content. The document also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely to improve search engine ranking for 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.cc/pify?keyword=the+nullification+crisis+student+worksheet+answer+key
    • http://files.woodlandsfrenchies.com/uploads/1/3/1/3/131383553/buvomagedax_dopiriveluk.pdf
    • http://vegububi.naonfoundation.org/uploads/1/3/0/7/130776208/godinividenusoju.pdf
    • https://cdn.shopify.com/s/files/1/0436/7728/6565/files/zabituwifujaratidegif.pdf
    • https://cdn.shopify.com/s/files/1/0432/2770/9597/files/31824957229.pdf
    • https://cdn.shopify.com/s/files/1/0437/8784/5790/files/star_wars_ffg_character_generator.pdf
    • https://cdn.shopify.com/s/files/1/0439/6145/0654/files/pdf_to_excel_converter_software_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/anlage_kind_2020_kindergeld.pdf
    • https://cdn.shopify.com/s/files/1/0434/1628/9442/files/10165445711.pdf
    • https://cdn.shopify.com/s/files/1/0437/5959/9765/files/45539217352.pdf
    • https://cdn.shopify.com/s/files/1/0431/4149/6986/files/81329798172.pdf
    • https://cdn.shopify.com/s/files/1/0438/3503/1712/files/13648545659.pdf
    • https://cdn.shopify.com/s/files/1/0447/5482/9463/files/anarcho_fascism.pdf
    • https://cdn.shopify.com/s/files/1/0435/5280/0920/files/nunirubedu.pdf
    • https://cdn.shopify.com/s/files/1/0436/7558/2617/files/jquery_get_screen_width.pdf
    • https://cdn.shopify.com/s/files/1/0434/6858/7174/files/sagarilemeliwitadevesaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/6073/9752/files/wallpaper_carousel_apk.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_off000069b6.bin
56f94c7530a00d247cdbed92e4fe17bc70a58c8ba9888512e13ad461ecb45984		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B6 5316 bytes
font_01_sfnt_off00007bd1.bin
bfbbc1baf59f659b2d7e122c92490be46d2bb4d359fa337601d09090e0ec16af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD1 10352 bytes

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