Malicious PDF — malware analysis report

Static analysis result for SHA-256 fefe6ac5b241d631…

MALICIOUS

PDF

147.5 KB Created: 2020-11-03 07:17:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a70c78d4906039449a9c1b891879dd7e SHA-1: 284ae7dc4bec321791b2e4bb73746ac5685892ae SHA-256: fefe6ac5b241d6314b5e072ac712c1a863ab29ca78c44ea85729b56c3abb5b14
134 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. The ML classifier also flagged this PDF as malicious. The presence of a remote support lure suggests an attempt to gain unauthorized access or control, potentially after the user clicks the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.link/123?keyword=mediumship+classes+in+ct
    • https://cdn-cms.f-static.net/uploads/4410004/normal_5f93540e0453e.pdf
    • https://cdn-cms.f-static.net/uploads/4368953/normal_5f89499ea571b.pdf
    • https://pudisipilusive.weebly.com/uploads/1/3/4/5/134597375/67cdd236627d4f8.pdf
    • https://cdn-cms.f-static.net/uploads/4403117/normal_5f9eeff6b8913.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/07975bfa-de1e-4368-ad56-7fc3a28f0f2f/livro_sobre_analise_fundamentalista.pdf
    • https://uploads.strikinglycdn.com/files/d8dcb9d1-6a42-48b1-a0ea-27053ff3cb2b/15947867531.pdf
    • https://cdn.shopify.com/s/files/1/0441/0179/5992/files/cole_haan_belt_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0502/8013/6866/files/80673816547.pdf
    • https://uploads.strikinglycdn.com/files/9f04ac49-df3b-4308-89a0-5c53da74312a/zederajaxonowab.pdf
    • https://uploads.strikinglycdn.com/files/5ea7ff67-3623-4e21-a9f0-74f594972a1a/13007325312.pdf
    • https://uploads.strikinglycdn.com/files/6493883c-e228-4dff-94cd-baba1490f014/94703176451.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ef66.bin
5fccc4b93669808a911be510fa35354615011d06cae0a9a774c0ef2e9a75b465
pdf-font-stream PDF embedded font (sfnt) at offset 0x1EF66 2828 bytes
font_01_sfnt_off0001f970.bin
ad452797fd3128be94ff3c83e64338a2c8eecba655a39febb8f202b680a09036
pdf-font-stream PDF embedded font (sfnt) at offset 0x1F970 4996 bytes
font_02_sfnt_off00020a43.bin
cbde8fed82872af46b747771ec4b782b8bc3967651695b862f71321ba0af35f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x20A43 11932 bytes
font_03_sfnt_off00023190.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x23190 4324 bytes