Malicious PDF — malware analysis report

Static analysis result for SHA-256 1124ae61426b6a6b…

MALICIOUS

PDF

43.0 KB Created: 2020-08-18 21:22:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08b38594111b4126774d4391a77bbb85 SHA-1: 817755bdfc5c3a3e5ebbcb17507a0aa4a1c20da5 SHA-256: 1124ae61426b6a6be785956b0516e7943ec9ba5e99b324efd305d4ede5aa0dd6
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a reference to the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness.

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=checklist+template+teachers+pay+teachers
    • http://leboruw.donnellpa.com/uploads/1/3/0/8/130814017/29d855604bd9c78.pdf
    • http://files.robbietech4teach.org/uploads/1/3/1/6/131636806/nuruxopow-jivaluvilefo.pdf
    • http://roxubepo.mychampionlifechurch.com/uploads/1/3/1/8/131856158/50313b5446a194.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4306/9858/files/jojonanolilagaribal.pdf
    • https://cdn.shopify.com/s/files/1/0432/3645/8654/files/sort_dictionary_python.pdf
    • https://cdn.shopify.com/s/files/1/0437/7329/6789/files/windows_10_latest_iso.pdf
    • https://cdn.shopify.com/s/files/1/0432/0244/5475/files/cfa_level_1_ebook_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/architectural_design_portfolio.pdf
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/kevuwiwewasudafo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9232/8102/files/91801478425.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/70042867578.pdf
    • https://cdn.shopify.com/s/files/1/0432/0958/8897/files/sikavunometumozun.pdf
    • https://cdn.shopify.com/s/files/1/0433/8640/5029/files/homer_simpson_drawing.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_off000069b5.bin
c289de3d303392222d5b657d528bbb4a64dc9566ef11297819ce9a4526fd3b62
pdf-font-stream PDF embedded font (sfnt) at offset 0x69B5 5244 bytes
font_01_sfnt_off00007b60.bin
4fdbb5b7c2fde3aa67fcdd973ba663c981c5c14f6d54949ca2c0d830f077a7b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B60 10480 bytes