Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e65ae2247494628…

MALICIOUS

PDF

41.0 KB Created: 2020-09-01 04:11:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ed834a05fd5145165adcdfc9b430912 SHA-1: ce8b66ae1e02ff2c9f023ff66074cea7da4d6d0c SHA-256: 5e65ae22474946283d9a274b5bac9da35964fefa3cb0da34b6d719802cc540e0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to PDF files hosted on Shopify. One of these links, https://ttraff.ru/wix?keyword=themes+ppt+2007, is identified as a malicious redirector. This suggests the document is part of a link farm or SEO manipulation scheme designed to drive traffic to malicious infrastructure. No scripts were extracted, but the presence of the malicious redirector and the sheer volume of links indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=themes+ppt+2007
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/wordly_wise_book_6_answers.pdf
    • https://cdn.shopify.com/s/files/1/0459/9781/8015/files/sans_institute_incident_response_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/5720/9766/files/42624758850.pdf
    • https://cdn.shopify.com/s/files/1/0431/5509/5712/files/65967524103.pdf
    • https://cdn.shopify.com/s/files/1/0429/0173/3542/files/blank_black_t_shirt_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/libutufisolefod.pdf
    • https://static.usrfiles.com/ugd/086daf_d26640766a4b40cb9ece2d9c1ff30727.pdf
    • https://static.usrfiles.com/ugd/b8c837_07b7e67539e94b319f124c84ebc7e973.pdf
    • https://static.usrfiles.com/ugd/286fb8_6271d4b11b60485ab8f29d0695b7a19c.pdf
    • https://cdn.shopify.com/s/files/1/0428/6709/7756/files/graphic_design_images_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/3641/5899/files/62939476385.pdf
    • https://cdn.shopify.com/s/files/1/0437/9626/7168/files/cleft_sentences_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0463/4152/1564/files/mixubuxewato.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/88021682179.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006344.bin
c1f23ab2345520b4c0d57fbd0367ec82be5729885442c9695b80e89a468db0da
pdf-font-stream PDF embedded font (sfnt) at offset 0x6344 5024 bytes
font_01_sfnt_off00007444.bin
8f0cce26f71fc2a023eed70847c9286c965ced893324416101904eba65ab46c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7444 10268 bytes