Malicious PDF — malware analysis report

Static analysis result for SHA-256 8274b2ce46a934fe…

MALICIOUS

PDF

44.2 KB Created: 2020-09-01 18:54:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc0e9b229eb7a93b6925688c036b1be5 SHA-1: a59d4f0fe1755a95ef2150e858536fc96ff4f200 SHA-256: 8274b2ce46a934fe63fd9902033986822102167674ea1f6dda0ad469c7976ea7
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a case study. This indicates a phishing or malware distribution attempt. The ML classifier strongly supports the malicious verdict. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious infrastructure.

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/wix?keyword=barista+lavazza+case+study+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/ea2f88_36e54e7e08b74c3e924fa404bce1d99c.pdf
    • https://static.usrfiles.com/ugd/e5a943_44ea65b3f6f8436585b8182e9107ff75.pdf
    • https://static.usrfiles.com/ugd/dd4472_bd13eb7ba3da44d49dcbbd4540bbd838.pdf
    • https://static.usrfiles.com/ugd/e1d12c_4442c8f852554e0d8dd47243c5d8a6a1.pdf
    • https://static.usrfiles.com/ugd/defdb4_a056a4004f734abe827d3b3b56a8cae8.pdf
    • https://static.usrfiles.com/ugd/b8c837_0b7ea52f661440188443e6796643502e.pdf
    • https://static.usrfiles.com/ugd/88a84f_0b19ab3b40e54d3d80173d89aa8a3ce4.pdf
    • https://static.usrfiles.com/ugd/48f461_cbc16fc75a484e0896dedba466c80956.pdf
    • https://static.usrfiles.com/ugd/696b8a_f93f526bc5584f80854f07030eac93a6.pdf
    • https://static.usrfiles.com/ugd/3aee12_101e8f5226d84ff894c937a105c3a3f3.pdf
    • https://static.usrfiles.com/ugd/b8c837_5fd5dcb1a92e49d8840df450f72f6b06.pdf
    • https://static.usrfiles.com/ugd/b8c837_03ed07f8648546b8beab0db661fe8c1b.pdf
    • https://static.usrfiles.com/ugd/b8c837_f163cd8c61464f6289dd395f4f0f5764.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_off00006c98.bin
b0153b57a59f51ff55586c32e20c1e0480130cf7e356ffcf06435715f4a62e4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C98 5408 bytes
font_01_sfnt_off00007f25.bin
1a0727a52eddfbd42e21beb06d1ebccc18d604acead595ff2f51de68fc6850df
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F25 10760 bytes