Malicious PDF — malware analysis report

Static analysis result for SHA-256 e75d8f43b78256a9…

MALICIOUS

PDF

41.5 KB Created: 2020-08-15 07:18:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fb7d2c09e1e534d13acfef8bb9e21b9 SHA-1: 040f2760be33734e52f4d207c376a5d5b206cccf SHA-256: e75d8f43b78256a97f4a947addf3820e62d9d0ec8a6271312ff76a2ddf122604
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector at 'ttraff.ru', which is likely used to funnel victims to further malicious content. The document body, though partially corrupted, contains text related to 'children's day speech in telugu pdf' and the malicious URL, suggesting a lure to attract users to click on the embedded links.

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=children
    • http://maxumorik.theravenreview.org/uploads/1/3/2/8/132816036/b36204856.pdf
    • http://majojo.maketucafe.co.nz/uploads/1/3/1/6/131606289/gifugakof.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9006/files/android_action_bar_item_background_color.pdf
    • https://cdn.shopify.com/s/files/1/0429/9177/9999/files/wovezufit.pdf
    • https://cdn.shopify.com/s/files/1/0428/8780/7129/files/18537344999.pdf
    • https://cdn.shopify.com/s/files/1/0428/3983/4791/files/albert_camus_the_myth_of_sisyphus.pdf
    • https://cdn.shopify.com/s/files/1/0434/0292/0086/files/mikiledemumamunun.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4261/files/nhtsa_sfst_manual_hgn.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/73524934169.pdf
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/46474813160.pdf
    • https://cdn.shopify.com/s/files/1/0430/7494/5184/files/belesenaxumurazutigev.pdf
    • https://cdn.shopify.com/s/files/1/0434/4777/9478/files/26484851854.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_off000064da.bin
3c9e35ee5ce899c07c7bd3945d34d4eb1d6a5c7cb5f0a5ed6909163b499915f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64DA 5456 bytes
font_01_sfnt_off00007769.bin
8923e7abb9ae4f72097cbd6daba71c6ede9ab17a1349ef6690c6ab51cd6975e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7769 9880 bytes

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