Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac1ae357eca1d29f…

MALICIOUS

PDF

47.8 KB Created: 2020-09-01 11:18:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b492e8f5713607205c182e665e971eb SHA-1: 3073828583c331501ffad54afdce73a704287bb2 SHA-256: ac1ae357eca1d29fc0dbb3fbb5f9515aac848fe3a78ffd9fe6677859ff588d4f
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to known malicious infrastructure, disguised with a lure related to a university date sheet. The PDF also contains a large number of embedded links, many of which point to benign Shopify URLs, suggesting a link farm or SEO poisoning tactic. The primary malicious link is https://ttraff.me/wix?keyword=delhi+university+ba+date+sheet+2018, which is the most critical IOC.

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.me/wix?keyword=delhi+university+ba+date+sheet+2018
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98048873934.pdf
    • https://cdn.shopify.com/s/files/1/0431/0577/9863/files/shin_osaka_station_food_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1866/files/4351951065.pdf
    • https://cdn.shopify.com/s/files/1/0436/3393/4496/files/powuvezigiwusejolanobapi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6833/2968/files/cae_speaking_part_1_questions_list.pdf
    • https://cdn.shopify.com/s/files/1/0433/3014/2363/files/66783694246.pdf
    • https://cdn.shopify.com/s/files/1/0436/0182/1859/files/komofimub.pdf
    • https://cdn.shopify.com/s/files/1/0440/1322/4094/files/tunefixilujoruvuzuvigixob.pdf
    • https://cdn.shopify.com/s/files/1/0464/7626/3574/files/tatikalalebemag.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/structured_network_cabling_standards.pdf
    • https://cdn.shopify.com/s/files/1/0434/0911/3253/files/longman_basic_dictionary_english_english_arabic.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_off0000704b.bin
f35e02711a6fc9b835d9b70ebb2c1fe2f571d70ca1a5f63a47b7dba10b232b34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x704B 5732 bytes
font_01_sfnt_off000083d6.bin
4587ecb29277f2e74afc4e7176b768ac6fc235322df9e0b6674079099417b6d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83D6 15252 bytes

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