Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ff6b6ad310ebe8…

MALICIOUS

PDF

50.2 KB Created: 2020-08-04 00:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 708d05b408613bfe38dfd965a30a41c6 SHA-1: 0b07ee6068ab0b1a5445175dabf50046c110d786 SHA-256: e6ff6b6ad310ebe82a260ebe1ec24cfdc17b43b4241a72347946dc55645d825f
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to a 'bpssc si syllabus 2020 pdf'. The presence of numerous other PDF links, many hosted on shopify.com, suggests a link farm or SEO poisoning tactic to distribute malicious content. The primary malicious IOC is the redirector URL.

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.com/pify?keyword=bpssc+si+syllabus+2020+pdf
    • http://files.cartooncaveman.com/uploads/1/3/1/4/131437149/girojo.pdf
    • http://files.squaredawaypainting.com/uploads/1/3/1/1/131164382/2282454.pdf
    • http://files.karlahelbert.com/uploads/1/3/1/8/131856188/a0900bbf5413d.pdf
    • http://files.dominickmscialabba.com/uploads/1/3/0/9/130969993/sebafep-widemej.pdf
    • https://cdn.shopify.com/s/files/1/0445/8138/8452/files/geankoplis_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/6248/5407/files/rapimakubitumuvesodonepi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/josuzafegeda.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/jekuxig.pdf
    • https://cdn.shopify.com/s/files/1/0431/7623/1063/files/57323776819.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/kuxaxekamovefedemimena.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9957/files/39177976793.pdf
    • https://cdn.shopify.com/s/files/1/0429/8237/5577/files/55957011842.pdf
    • https://cdn.shopify.com/s/files/1/0433/6559/7342/files/fusionner_plusieurs_en_1.pdf
    • https://cdn.shopify.com/s/files/1/0435/7967/0689/files/zoziluluvulipixexoju.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejupabofutub.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zafon.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_off00006e9f.bin
a8e1f537557210f0b03457d1ca6f7880428e07b29143066743ccb68646b97a5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9F 5616 bytes
font_01_sfnt_off000081d6.bin
85fff822be11a36a2aa8adb316a95a613f5129e07af573a3fec4dcee9d6dfb23
pdf-font-stream PDF embedded font (sfnt) at offset 0x81D6 9796 bytes
font_02_sfnt_off0000a397.bin
94e9838f512759ab2003f70217fc0c5d1d364bed658e83c33082bbaacd3bf189
pdf-font-stream PDF embedded font (sfnt) at offset 0xA397 6408 bytes