Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebedf13d98e7966c…

MALICIOUS

PDF

46.8 KB Created: 2020-08-22 03:57:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03cfa171dd869e5be2536c4531032e88 SHA-1: 6ed5e7c938fd1447acc9c31b6bbc4858136cada4 SHA-256: ebedf13d98e7966c608c0e645ee1aa5f5dd4dc97fd811d532d0043ee9dc4f864
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links, however, directs to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector. This suggests the PDF is designed to lead users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=book+review+definition+pdf
    • http://files.veescape.com/uploads/1/3/2/7/132740181/8034747.pdf
    • https://cdn.shopify.com/s/files/1/0432/6300/0734/files/artificer_apprentice_question_paper.pdf
    • https://cdn.shopify.com/s/files/1/0431/5293/3021/files/libreoffice_impress_background_templates.pdf
    • https://cdn.shopify.com/s/files/1/0428/6123/2294/files/64083373432.pdf
    • https://cdn.shopify.com/s/files/1/0428/7394/6275/files/beckmann_and_ling_s_obstetrics_and_gynecology.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/25912499018.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/95614058719.pdf
    • https://cdn.shopify.com/s/files/1/0437/1972/1115/files/48203605202.pdf
    • https://cdn.shopify.com/s/files/1/0434/6455/6710/files/benogulegarekejor.pdf
    • https://cdn.shopify.com/s/files/1/0428/5199/1719/files/senior_network_administrator_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6200/files/18th_brumaire_of_louis_bonaparte.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_off00006f32.bin
6127c306f0e1ab520d51e6b1a105e3248b498cb57599ef87be7ebc453dfba27a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F32 4668 bytes
font_01_sfnt_off00007f34.bin
43047890d76f6ef66d54eb914dc730adb0a388e661aeac6ba3898965c8864495		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F34 9780 bytes
font_02_sfnt_off0000a0a1.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0A1 4324 bytes

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