Malicious PDF — malware analysis report

Static analysis result for SHA-256 5680addaeec0322e…

MALICIOUS

PDF

43.6 KB Created: 2020-08-14 14:57:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b6e35adc4abb37895c2403e61101f0b SHA-1: 7ca4c48585bde33f14ca67cd0f3a30961619658e SHA-256: 5680addaeec0322eb154e62526ca694e369357a0c51349158d8c08df138c8f29
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one pointing to a known malicious redirector. The document body is heavily obfuscated, but the presence of numerous external PDF links suggests a link farm or a method to distribute further malicious content. The primary malicious link identified is https://ttraff.com/pify?keyword=koreader+kobo+pdf.

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.com/pify?keyword=koreader+kobo+pdf
    • http://files.ten4enterprises.com/uploads/1/3/1/4/131408970/xomoriwadi_xaxememobum_dexep.pdf
    • http://files.teamacorntriathlonclub.org/uploads/1/3/1/4/131438784/2356931.pdf
    • http://jizur.fairfieldtaxpayer.com/uploads/1/3/1/3/131383483/bevimupasexilufogobo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4511/6311/files/lutelamoleguk.pdf
    • https://cdn.shopify.com/s/files/1/0432/3488/5796/files/42139924134.pdf
    • https://cdn.shopify.com/s/files/1/0430/7291/3557/files/html_format_to.pdf
    • https://cdn.shopify.com/s/files/1/0437/8319/2738/files/90610705586.pdf
    • https://cdn.shopify.com/s/files/1/0431/3566/4284/files/ben_10_cartoon_network_free_game.pdf
    • https://cdn.shopify.com/s/files/1/0448/0958/4802/files/latex_cv_template_picture.pdf
    • https://cdn.shopify.com/s/files/1/0434/6213/1869/files/42653764359.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3270/files/vofitulasuvisoviw.pdf
    • https://cdn.shopify.com/s/files/1/0431/2078/7613/files/laxojurikinikiwopelagig.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19490865332.pdf
    • https://cdn.shopify.com/s/files/1/0432/2502/2621/files/71777953171.pdf
    • https://cdn.shopify.com/s/files/1/0430/7678/0192/files/veroset.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_off00006d6f.bin
16f598bddfa85ea84d2e34201a799703f9d3da2dc2cc00772ef898e88016722e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6F 4996 bytes
font_01_sfnt_off00007e7e.bin
9b2a590918a7d07ca911c4ce2f221ae4c445bdd455b62edfaf20119ee1eb37e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E7E 10376 bytes

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