Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dabb8f2fbf6c5eb…

MALICIOUS

PDF

47.7 KB Created: 2020-08-24 18:32:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fdd7f49ec2727282be2074bda2022a9 SHA-1: 5147d81c257e5ad0d008e87a7f43e7a443cc9d56 SHA-256: 2dabb8f2fbf6c5eb9aefea104585ea055ce0736aca4e201fe3d16d77d6ede105
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 are disguised as academic papers, pointing to a link farm. One critical heuristic identified a link to known malicious redirector infrastructure at ttraff.ru. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to a malicious site.

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=capillary+electrophoresis+methods+for+pharmaceutical+analysis+pdf
    • http://files.t4tenglish.com/uploads/1/3/1/0/131071129/3897984.pdf
    • https://cdn.shopify.com/s/files/1/0433/4023/4902/files/tapagozi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7901/5327/files/counter_strike_global_offensive_rate.pdf
    • https://cdn.shopify.com/s/files/1/0431/3382/9277/files/bupejibumukivimo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4293/0842/files/sinoxobolavinerov.pdf
    • https://cdn.shopify.com/s/files/1/0430/5305/6149/files/70610124652.pdf
    • https://cdn.shopify.com/s/files/1/0438/4751/6325/files/15217649851.pdf
    • https://cdn.shopify.com/s/files/1/0438/4695/9261/files/business_logic_in_mvc.pdf
    • https://cdn.shopify.com/s/files/1/0432/2190/9662/files/l_cologie_dfinition.pdf
    • https://cdn.shopify.com/s/files/1/0434/2031/9893/files/27797257693.pdf
    • https://cdn.shopify.com/s/files/1/0434/5603/7016/files/4641380457.pdf
    • https://cdn.shopify.com/s/files/1/0433/9741/5077/files/hidden_camera_without_icon_app.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_off00006f67.bin
7388bf3a4f6ae6f5c39e9896bce4413bd224a008b59d72b0e4329463e05c8e4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F67 5404 bytes
font_01_sfnt_off000081a6.bin
47b76271d741f8d040af12675959707dd30f17ee5fd8a49f7ade3d2669ae278a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81A6 15348 bytes

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