Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad7efa9c2a105df2…

MALICIOUS

PDF

42.2 KB Created: 2020-08-31 21:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4dbe9adb04b9c47b5ed0fced2ef6d2de SHA-1: 8ea94831e7fb2a420a5f6eeb33d03cd18384391a SHA-256: ad7efa9c2a105df208396e3ef72f36f33b4e7bd5425296ad96aa6b0c208908fa
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector link farm. The document body text, though partially corrupted, includes 'Skills needs analysis template' and a URL that aligns with the heuristic findings. The primary malicious URL identified is ttraff.ru, which is used in conjunction with a keyword that suggests a lure for users seeking templates. The presence of many Shopify links, while individually benign, contributes to the overall SEO link farm characteristic.

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/wix?keyword=skills+needs+analysis+template
    • https://cdn.shopify.com/s/files/1/0434/7179/8436/files/xusume.pdf
    • https://cdn.shopify.com/s/files/1/0431/9700/5981/files/xulepitemizivexu.pdf
    • https://cdn.shopify.com/s/files/1/0448/0348/9954/files/cv_format_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5535/7852/files/26279592570.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7962/files/miwevimojatavawifabon.pdf
    • https://cdn.shopify.com/s/files/1/0440/5267/6773/files/beps_action_1_final_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/9856/1948/files/bobine_lectrique.pdf
    • https://static.usrfiles.com/ugd/cf79db_19baa39a89fc456aad623762b0f70889.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_d3e0a3db295548f4bdaaf732b5c842eb.pdf
    • https://static.usrfiles.com/ugd/628a76_7328bc51b7f142dfb790702c33a03e56.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_off00005e67.bin
05307c79731c8b6028373ce92cbe3d2259f58ffa0c28db0046642b03ae3e258f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E67 5280 bytes
font_01_sfnt_off00007054.bin
a011639dc53b398c3e9643d42fc247ba785222aba6db51b717fd3c3b46d20033		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7054 14128 bytes

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