Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0fd27c6d5406f45…

MALICIOUS

PDF

42.6 KB Created: 2020-08-24 20:39:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f05fb260cd8c9cef91322dc784f9019c SHA-1: 5c03ae77a56acd31b8b240827043a3b803d52e58 SHA-256: d0fd27c6d5406f458eb608cd7be0c39d1e88d9423acad3ea8199aabf5ab30f04
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a prominent link that, when clicked, redirects to a malicious URL disguised as a corporate email security policy template. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies this behavior. The ML classifier also strongly indicates maliciousness. The document body, though heavily obfuscated, contains the same lure text and the malicious URL.

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.cc/pify?keyword=corporate+email+security+policy+template
    • http://files.southdakotaagriculturallaboratories.com/uploads/1/3/2/7/132710783/42c42ec.pdf
    • http://files.childrensfocusfoundation.org/uploads/1/3/2/6/132695492/1433376.pdf
    • http://files.goepic.ca/uploads/1/3/1/3/131382028/1edc5f8e4c19f2.pdf
    • http://files.aurum-et-argentum.net/uploads/1/3/1/6/131636946/nimilufezavugo_vafude_rexesogufogovi.pdf
    • http://files.yuwuvfx.com/uploads/1/3/1/4/131406440/5539358.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8841/files/magolekek.pdf
    • https://cdn.shopify.com/s/files/1/0434/7065/1542/files/98736287880.pdf
    • https://cdn.shopify.com/s/files/1/0435/2137/6410/files/tidukipajiponasaboguzer.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/32370297248.pdf
    • https://cdn.shopify.com/s/files/1/0428/7715/7542/files/67630818245.pdf
    • https://cdn.shopify.com/s/files/1/0430/3663/9395/files/prism_spectrometer.pdf
    • https://cdn.shopify.com/s/files/1/0435/9569/4239/files/zamozoloruzeji.pdf
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/4633655903.pdf
    • https://cdn.shopify.com/s/files/1/0432/9173/8277/files/87357887483.pdf
    • https://cdn.shopify.com/s/files/1/0435/3985/7572/files/derofajufebaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/6636/6869/files/javascript_force_download.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_off00006aa7.bin
c5f6b2baf08708c7c6aaa973a2b326d6218694f5e190121774b7277546bdbaf4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA7 5084 bytes
font_01_sfnt_off00007bd9.bin
7e7eaa60d6187db060e0eb6b3e0759aeb467c63d1b65010cd610fbbc0ac98f6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD9 9768 bytes