Malicious PDF — malware analysis report

Static analysis result for SHA-256 720c84e2a5f9ed9e…

MALICIOUS

PDF

41.3 KB Created: 2020-08-23 23:01:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32bcc3d6952356e333986a9d69cdd59a SHA-1: 32b309fc5f6b70c8cc782bd33864ebc6a13ceefc SHA-256: 720c84e2a5f9ed9e8793d0ca9dbeb8f72a69fc445005433d1e1bcd7a6c2bd7f6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a lure related to 'board of directors resolution template uk' and embeds a link to a known malicious redirector. It also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious, and the SE_PAYMENT_REDIRECT_LURE heuristic indicates a business-email-compromise pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=board+of+directors+resolution+template+uk
    • http://files.kencot.info/uploads/1/3/1/4/131407921/tetakafo-lorovod-xojabuwugobokib-rezutefi.pdf
    • http://files.yukonriverdesigns.com/uploads/1/3/0/8/130813818/089609dbe3b938.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5699/6247/files/vofelajutotametos.pdf
    • https://cdn.shopify.com/s/files/1/0433/3145/3081/files/kerefokutifotatida.pdf
    • https://cdn.shopify.com/s/files/1/0435/1256/1819/files/84441017021.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemisavixazesunomezixe.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9957/files/nedazakifew.pdf
    • https://cdn.shopify.com/s/files/1/0435/2344/0792/files/70571776196.pdf
    • https://cdn.shopify.com/s/files/1/0431/5211/3820/files/99384192270.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zurutadodusabexefiba.pdf
    • https://cdn.shopify.com/s/files/1/0433/3387/7915/files/swayamvaram_naa_songs_old.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/29608070504.pdf
    • https://cdn.shopify.com/s/files/1/0438/7019/1771/files/chemistry_textbook_for_secondary_school.pdf
    • https://cdn.shopify.com/s/files/1/0428/2023/9519/files/canon_drivers_support.pdf
    • https://cdn.shopify.com/s/files/1/0432/8754/3964/files/firam.pdf
    • https://cdn.shopify.com/s/files/1/0432/9521/1680/files/gepewe.pdf
    • https://cdn.shopify.com/s/files/1/0435/2363/7399/files/96091944513.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006302.bin
2feb8aa855445126b5478d7d5ed67dccecd6cae190c63c2504f1aeff4739a551		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6302 5416 bytes
font_01_sfnt_off00007556.bin
9fbac767d4a0afe11f67561fc362e6fec86d51e8b2c9cb83418cb6eac1f3b4f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7556 10044 bytes

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