Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2dd694128a8f70c…

MALICIOUS

PDF

46.8 KB Created: 2020-10-30 13:31:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d67c4e6f3771a075e8a047d0a67e7ab3 SHA-1: d075e7c0a733fda05ee798093b55b74b011162c5 SHA-256: b2dd694128a8f70cdc8d778bfb09cca4f9f8fb476d3caaa74dcd315c031a4926
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://gettraff.ru/strik?keyword=online+donation+request+form+request+form In PDF document text
    • https://romovemesokawaj.weebly.com/uploads/1/3/4/4/134479736/koside-losadimi-lejarukafegax-bepago.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/2d4dea22-8444-405f-b2be-7520d35d4322/46481756429.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1df7a61b-fc66-4b7a-ba75-17f125f28079/tivosepimizuvakujovuvupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cedc575-d4a6-4e79-8f43-b4cc6045ce56/dupexazobetanaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95d1de21-14e9-4ecc-a7da-a4bdfa3155ec/metaphysical_meditations_paramahansa_yogananda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dab35d18-a661-432a-9efa-94698e9e3d83/tididuremudomaxojarija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88a71da7-b101-434b-a871-b7d49af5cdab/tixisawabufowonupukaxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d0237a9-68d4-4b26-88da-faee5c136853/jenipukivenufilodov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b415146-b5e2-4680-8499-27f166ea1390/96605238030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a71b58e-b869-45b4-8869-5f626c3486f7/xuxasezevapizasijewaki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50d3648d-3737-468c-8b66-5336c09afde7/10226469466.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9672/7460/files/wapking.cc_bhojpuri_mp3_songs.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE4 5088 bytes
SHA-256: bc031d3a61baa7b85f2dae331df649d7eaf48973e38b7940ae1b1d190ba8b7a6
font_01_sfnt_off00007d11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D11 10316 bytes
SHA-256: 59e430dfe8ba6775ebbbca937663ab06c5a042c7a2aa99aa409b3d66a43b7ed7
font_02_sfnt_off0000a086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA086 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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