Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff123736c3c23e6a…

MALICIOUS

PDF

46.7 KB Created: 2020-08-19 03:18:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52ed5b2b37e183719e0d72de7c8e530d SHA-1: 9eb709a1b495818569aeb8def2139b3bae6fbd9f SHA-256: ff123736c3c23e6adb1e504799e96847ea9ac7a56f76f2a80470d8ddbcea764b
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with a critical heuristic identifying it as a PDF link farm. One of the primary URLs, 'https://ttraff.ru/pify?keyword=angular+directive+use+attribute+in+template', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and numerous other links, many pointing to Shopify domains, suggesting a tactic to manipulate search engine results or distribute further malicious content. No scripts were extracted, but the extensive link farm points to a content-based attack vector.

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=angular+directive+use+attribute+in+template
    • http://jagarup.cgapak.org/uploads/1/3/0/8/130874474/bomamukonut.pdf
    • http://files.evilgeniusentertainment.com/uploads/1/3/1/8/131856907/kezirunibona.pdf
    • https://cdn.shopify.com/s/files/1/0435/4437/9546/files/cleves_primary_school_ofsted_report_2015.pdf
    • https://cdn.shopify.com/s/files/1/0447/9247/9901/files/benin_mix_songs.pdf
    • https://cdn.shopify.com/s/files/1/0436/0349/3028/files/ruvageleref.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/78250685483.pdf
    • https://cdn.shopify.com/s/files/1/0430/0711/5423/files/bozudipaxoruzumesolixomux.pdf
    • https://cdn.shopify.com/s/files/1/0431/4388/9058/files/vetoruterabegizidipago.pdf
    • https://cdn.shopify.com/s/files/1/0437/4318/2999/files/wifi_camera_to_android_phone.pdf
    • https://cdn.shopify.com/s/files/1/0435/1184/0927/files/70509724367.pdf
    • https://cdn.shopify.com/s/files/1/0434/3352/5400/files/keforute.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_off000069b8.bin
e5918ca3ed46c1dc075e003125a5e7731c75fa693c7017495e4991c2d98367e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B8 5580 bytes
font_01_sfnt_off00007c91.bin
4de28e1b5d980bed664a0e66719e30ea148166bddd95f057d327a493b10eda00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C91 15812 bytes

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