Malicious PDF — malware analysis report

Static analysis result for SHA-256 d70aad0b4f3173d3…

MALICIOUS

PDF

43.0 KB Created: 2020-08-18 19:18:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bbf4eb4303d8bd70f16492ef2c0a871 SHA-1: 9bcd4a77014e5bfd8315299e57588f200ec1ed0e SHA-256: d70aad0b4f3173d30d25a489312c0c1a07f25db2c80bcddb57fba1f906a690c7
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a search result for a Shakespearean sonnet analysis. This link points to `https://ttraff.cc/pify?keyword=william+shakespeare+sonnet+18+analysis+pdf`, which is known to lead to malicious infrastructure. The document also features a link farm of 26 external PDF links, many hosted on `cdn.shopify.com`, likely to manipulate search engine results and increase the chances of users clicking on malicious content. No scripts were extracted from this sample.

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.cc/pify?keyword=william+shakespeare+sonnet+18+analysis+pdf
    • http://files.roadmasterdrivingschoolmn.com/uploads/1/3/1/4/131411539/foleridiburo-tuwiwewogub-jinegewereg.pdf
    • https://cdn.shopify.com/s/files/1/0431/6472/9512/files/vewikuluvanenusorukegix.pdf
    • https://cdn.shopify.com/s/files/1/0429/4659/2924/files/malawaxofusikunej.pdf
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/electronic_configuration_of_actinides.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5894/files/vimolulovub.pdf
    • https://cdn.shopify.com/s/files/1/0428/7728/8611/files/nagilifusa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63529720688.pdf
    • https://cdn.shopify.com/s/files/1/0430/8959/2473/files/pay_slip_sample.pdf
    • https://cdn.shopify.com/s/files/1/0429/9600/7065/files/41161517479.pdf
    • https://cdn.shopify.com/s/files/1/0430/9309/8660/files/42650408908.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/answers_bible_curriculum_teacher_digital_resources.pdf
    • https://cdn.shopify.com/s/files/1/0434/2956/0486/files/jquery_refresh_page.pdf
    • https://cdn.shopify.com/s/files/1/0435/0682/7428/files/gejagixite.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/
    • https://cdn.shopify.com/s/files/1/0430/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068d1.bin
c09280d7a83b9813711b6722ae0b6b34f972b045833c54a469d96bd95887a508		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68D1 5704 bytes
font_01_sfnt_off00007c2b.bin
eda3970702d034576c50e1c716e736e15da905b234271e033d6627976f5badec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C2B 10176 bytes

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