Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b4427e17c499929…

MALICIOUS

PDF

47.7 KB Created: 2020-08-03 13:21:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d47299b5325fc7f2e8750ff2f6743383 SHA-1: 9dfe6edce1f4e363a54678f1b59efc2e80063844 SHA-256: 3b4427e17c49992966eab9d2511e860cb06e2a0162c04be952f14346f0f3b765
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to malicious content. The document also functions as a link farm, pointing to numerous other PDFs hosted on various domains, many of which are suspicious. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is part of a malicious campaign, likely for phishing or malware distribution.

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.com/pify?keyword=cadmio+elemento+pdf
    • http://nixedavan.rejuvenateconsultant.com/uploads/1/3/0/7/130738524/9203828.pdf
    • http://rerera.xaacm.org/uploads/1/3/0/8/130873876/aec350d5ed3982.pdf
    • http://files.patriciagodden.com/uploads/1/3/2/6/132681359/wifix-lipowumuno-buzuvusezada.pdf
    • http://files.wildrumpusphotography.com/uploads/1/3/0/7/130776561/bda0b7fe8c.pdf
    • http://files.hollyberrycatering.com/uploads/1/3/2/8/132814611/5681968.pdf
    • https://cdn.shopify.com/s/files/1/0436/4373/2126/files/zozukabinafiziduludu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8765/8141/files/discrete_mathematics_for_computer_science_book_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/dasasuzevudazorofesug.pdf
    • https://cdn.shopify.com/s/files/1/0435/4726/3128/files/nenader.pdf
    • https://cdn.shopify.com/s/files/1/0430/8815/0690/files/kadaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/4996/5985/files/4947381304.pdf
    • https://cdn.shopify.com/s/files/1/0437/1762/3959/files/karowibamujudifit.pdf
    • https://cdn.shopify.com/s/files/1/0433/1415/1589/files/37533945343.pdf
    • https://cdn.shopify.com/s/files/1/0431/0374/8260/files/wixoxedugewarezutisemun.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/11903710978.pdf
    • https://cdn.shopify.com/s/files/1/0430/2379/4337/files/30472905150.pdf
    • https://cdn.shopify.com/s/files/1/0431/7796/7778/files/94243488765.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_off00007902.bin
005165bced6241ccc5b5b4423c8cfb2ec14fa1f51ae1f4fcb5c68e68e549c9f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7902 4816 bytes
font_01_sfnt_off00008956.bin
24987bfbd831e636b95bb6b4cf5772e0b64cf88424b793cc6f8ad5968a7de9e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8956 11956 bytes