Malicious PDF — malware analysis report

Static analysis result for SHA-256 29bbbb5b26a76fcb…

MALICIOUS

PDF

53.8 KB Created: 2020-08-20 05:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54419d792d54ab0a9122ed71f25da5d5 SHA-1: ded71f23324b6d11af480d05dd362a6c7217fe14 SHA-256: 29bbbb5b26a76fcb59cb6ce3ad10455edffb7cf13c983344d5cff5c8edf0492d
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure. The document body text and embedded URLs suggest a lure related to a 'certificate of appreciation letter template'. The primary malicious URL identified is https://ttraff.ru/pify?keyword=certificate+of+appreciation+letter+template, which is likely used to redirect the user to further malicious content. The file also contains a large number of embedded links, many pointing to Shopify, which is flagged as a link farm.

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=certificate+of+appreciation+letter+template
    • http://files.barkingwithbutler.com/uploads/1/3/0/7/130739826/6fbf3f.pdf
    • https://cdn.shopify.com/s/files/1/0435/9687/3885/files/android_tv_apps_on_pc.pdf
    • https://cdn.shopify.com/s/files/1/0429/2883/2675/files/dikoxetudeput.pdf
    • https://cdn.shopify.com/s/files/1/0437/7804/8161/files/flipkart_bedsheet_offer.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/irs_form_2553_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/28295402008.pdf
    • https://cdn.shopify.com/s/files/1/0432/3016/7203/files/zugawuwubozepikelonatuwim.pdf
    • https://cdn.shopify.com/s/files/1/0431/9723/5363/files/85524656327.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/important_national_and_international_accreditation_bodies_for_food_safety.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000884b.bin
01f36c6afeac6fd6d465ec1ec180a54a84a0719e9b1913ac210c5d1a0f94998f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x884B 4792 bytes
font_01_sfnt_off00009875.bin
fac5d2c1aeed240ac1d7d15949633f086bec93d0525cc1ac1d44a75ca7114a9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9875 10648 bytes
font_02_sfnt_off0000bcc6.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCC6 4324 bytes

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