Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e03d1b963f5f836…

MALICIOUS

PDF

41.7 KB Created: 2020-08-30 05:39:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ef3ae8dec061d29d171a429b184071f SHA-1: 782b0489d9370c0e88f45298bbb93b3b9ee16a78 SHA-256: 0e03d1b963f5f836a1f0aaaf96f826c326450e2b7d5fa0380c76bc7a18e564b0
154 Risk Score

Malware Insights

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

The PDF document contains a lure related to scholarship essay examples, but the embedded link redirects to a known malicious domain. The ML classifier strongly indicates maliciousness, and the PDF is flagged as a redirector link and a link farm. While no scripts were explicitly extracted, the nature of the PDF and its embedded links suggest an attempt to redirect the user to a malicious site, 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.cc/wix?keyword=scholarship+essay+examples+about+career+goals+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0454/5645/7880/files/warfarin_guidelines_nice.pdf
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/97153999656.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1373/files/sejagoxikukevotu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4310/1591/files/snellen_eye_chart.pdf
    • https://static.usrfiles.com/ugd/067ecb_20bffffc28f64eb28cadf7a5df6eea15.pdf
    • https://static.usrfiles.com/ugd/b8c837_8c369762975a41ddad84b8131cc23851.pdf
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/94084153966.pdf
    • https://cdn.shopify.com/s/files/1/0430/7746/8311/files/numabafezexur.pdf
    • https://cdn.shopify.com/s/files/1/0440/8298/7173/files/wedding_declaration_of_intent.pdf
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/47477098100.pdf
    • https://static.usrfiles.com/ugd/122077_4441d1089bb241c095413c1919d47cb3.pdf
    • https://static.usrfiles.com/ugd/510a18_5fe6a9e060b641f5a86ad5a7b318ae5d.pdf
    • https://static.usrfiles.com/ugd/b8c837_ead90ef71f9848858fb5feead66f8880.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_off00006319.bin
1cdbd1b6ff4795b42738edaa0f0599a12c7c5c83dc7bbf16e4e0c9b454049cd7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6319 5984 bytes
font_01_sfnt_off00007754.bin
f670ab5f07132cf0d27bad23d99ec4a451da573efae9bd4e733ee2d830c3f506
pdf-font-stream PDF embedded font (sfnt) at offset 0x7754 10172 bytes