Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f02e7c6e173e7d1…

MALICIOUS

PDF

32.7 KB Created: 2020-11-04 03:15:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3e752ecf37fa1698aa0fe3a3278e729a SHA-1: 986bd9b4490396713dc780f3fc503e173dae6fdc SHA-256: 7f02e7c6e173e7d1bb99bfa6517be5ac8c7c23aab599cdb43e7979334bb1d0b9
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains a link to a known malicious redirector at https://cctraff.ru/aws?keyword=phase+difference+pspice. The document body is heavily obfuscated, but the presence of numerous links, including the malicious one, indicates an attempt to lure the user to malicious infrastructure, 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/aws?keyword=phase+difference+pspice In PDF document text
    • https://renikafajuwigag.weebly.com/uploads/1/3/4/3/134317319/7818334.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5f9c8a39d5b89.pdfIn PDF document text
    • https://wanezevidika.weebly.com/uploads/1/3/4/5/134588498/roxal-fekutanakononud-bijujug.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/646693.pdfIn PDF document text
    • https://vekaluledezo.weebly.com/uploads/1/3/4/2/134235689/vubojuriwog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376852/normal_5f9126c92c906.pdfIn PDF document text
    • https://jinezosibe.weebly.com/uploads/1/3/4/4/134454760/5aaf6a.pdfIn PDF document text
    • https://jumabesabixoduz.weebly.com/uploads/1/3/4/3/134368642/5090935.pdfIn PDF document text
    • https://lokixesope.weebly.com/uploads/1/3/1/6/131607163/76e789.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9651/4461/files/12028953826.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/846319bd-6791-45bc-9d4e-d4e955bc052d/63558655266.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15cc29be-da72-4845-bd44-4cefd92b659e/tokunifatulumogerok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efd65993-6651-4c90-8cbc-a47394c774b3/from_doc_to_uninstall.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9391b137-1083-4c96-926a-2b66638fecf2/wizik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0c181ae-12e6-4d0d-82cf-bbe2b6baa8c5/google_slides_print_handouts.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46C3 5212 bytes
SHA-256: 6d3e62ef74140da907ca5df2939fcdf257cf5016db8f6a7380924c094abe95f0
font_01_sfnt_off00005878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5878 8580 bytes
SHA-256: 3360754d018dc112ecb83807a6958b0044cc4571bcdd2e818835fffff522a76f

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