Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7dba1d8b8827c45…

MALICIOUS

PDF

47.0 KB Created: 2020-08-23 08:51:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bbaa01d5d97c972e905cecb9e9d2058 SHA-1: 54dc6fc9a65a90eba10c09098d06ec37b6af7a73 SHA-256: c7dba1d8b8827c4567797c9b83812b08b176d7a0d94981c339833db78b83808d
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to a redirector service. The primary malicious link, https://ttraff.ru/pify?keyword=arnold+chiari+malformation+awareness+month, is designed to lead the user to further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is a malicious redirector disguised as a document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=arnold+chiari+malformation+awareness+month
    • http://wararubu.strozzistawzeeh.com/uploads/1/3/2/8/132814930/4298f.pdf
    • http://files.honestlycleanllc.com/uploads/1/3/2/7/132740533/1087252.pdf
    • https://cdn.shopify.com/s/files/1/0437/7106/8577/files/embankment_dam_design_example.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/mopijegovilaxutara.pdf
    • https://cdn.shopify.com/s/files/1/0437/2099/9064/files/color_code_in_css.pdf
    • https://cdn.shopify.com/s/files/1/0431/6351/7092/files/kugapu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9341/7367/files/50748991978.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/gaxajitinumeve.pdf
    • https://cdn.shopify.com/s/files/1/0437/7391/9393/files/escape_rope_gungeon.pdf
    • https://cdn.shopify.com/s/files/1/0434/3303/3880/files/3353516396.pdf
    • https://cdn.shopify.com/s/files/1/0444/0319/6070/files/how_to_change_hud_color_elite_dangerous.pdf
    • https://cdn.shopify.com/s/files/1/0431/3907/2161/files/70679239773.pdf
    • https://cdn.shopify.com/s/files/1/0433/8899/3703/files/32175415373.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_off00006db8.bin
60cc2fc01293019f9688b08ca03cfedccd123c7962cca3ac9070059d699005ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB8 5132 bytes
font_01_sfnt_off00007efb.bin
4ed3f6f71cd05a39ce5ac96f7bb653599e505342232b177ee9ef29d93a41b1de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EFB 9852 bytes
font_02_sfnt_off0000a0aa.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0AA 4324 bytes

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