Malicious PDF — malware analysis report

Static analysis result for SHA-256 b65474d250427900…

MALICIOUS

PDF

42.8 KB Created: 2020-09-16 20:06:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1298d82be8074bf5f2bef01e1df398f0 SHA-1: 5dba76e01aec1dd9878ee75a373348ab75d70828 SHA-256: b65474d250427900816d0f9ec6ce56cf53fb3ecbecef6aeea7896a66398efaa7
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to a URL that appears to be part of a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains the malicious URL and references to educational content, suggesting a lure. The presence of numerous external PDF links, many hosted on seemingly benign platforms like Shopify, indicates an attempt to obscure the malicious redirector.

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.link/wix?keyword=journeys+reader%2527s+notebook+grade+3+online
    • https://cdn.shopify.com/s/files/1/0436/1139/0115/files/gitozudotigegu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9862/8501/files/lazexigubididu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3533/6605/files/caccia_al_tesoro_compleanno.pdf
    • https://cdn.shopify.com/s/files/1/0439/1511/6696/files/converting_km_to_miles_ks2_worksheet.pdf
    • https://be550070-8780-475d-bd07-3fd2783c8d5b.filesusr.com/ugd/a4ea6c_7b80bcb3c08c47d6ad159be0116b3658.pdf?index=true
    • https://136bd0e9-e62f-4302-82eb-9513e7645367.filesusr.com/ugd/6cabbb_a2c42ae8f2f1494a9d249afdb589210c.pdf?index=true
    • https://1a374516-562b-4928-aa2a-858024b12ff4.filesusr.com/ugd/7cefa9_db5e8a54ca4749ea8aa03d28ffe15d22.pdf?index=true
    • https://0c26cef0-ea79-434b-9b5b-ac020b249dc2.filesusr.com/ugd/1d3654_c1dd2b0bbb544603bf03681ad9a73566.pdf?index=true
    • https://d2900a77-09fe-4680-9f6a-376555189997.filesusr.com/ugd/277b62_b568d33eae2f4075833d4a6a7d18d5b1.pdf?index=true
    • https://796170b6-0396-42e8-bd41-c2db36ec67ea.filesusr.com/ugd/d8966e_34d168d2b29f4d59b904be407a1b842f.pdf?index=true
    • https://d0b435be-c9a2-456f-81c0-31cdb38866a5.filesusr.com/ugd/e1c37d_25d9a194e1a54add849cc27d714ea0df.pdf?index=true
    • 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_off000067a1.bin
fcfc9360b945597a4ab37b60481e0eb521bee79f22e5e54cb5bb61507c01ac46
pdf-font-stream PDF embedded font (sfnt) at offset 0x67A1 5484 bytes
font_01_sfnt_off00007a64.bin
f9c0e281b4e3fcd4313fd1d7caf4ce522f702dce482faa0821556cfe2ff8a0cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A64 10548 bytes