Malicious PDF — malware analysis report

Static analysis result for SHA-256 85d6a6806bb1504e…

MALICIOUS

PDF

47.7 KB Created: 2020-10-09 17:21:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: dbf335ee58f09700ba9a83efa9d59c7b SHA-1: 6892437500daec008e2a27bb01f784629320f19b SHA-256: 85d6a6806bb1504eb5a69ea9b492d775224c7dd3555d11a65c9b12471b59df3c
154 Risk Score

Malware Insights

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

The PDF contains numerous links designed to appear as search results for a specific product, with one prominent link leading to known malicious redirector infrastructure. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's part of a link farm designed to distribute malware or phish users. No scripts were extracted, but the embedded links are the primary attack vector.

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://cctraff.ru/strik?keyword=ryobi+hedge+trimmer+attachment+not+working In PDF document text
    • http://toripivib.buildingboxes.co.nz/uploads/1/3/1/3/131379012/2c40f.pdfIn PDF document text
    • http://pepol.g3valeting.co.uk/uploads/1/3/0/8/130814682/makufibipegu-kodaditejo-xidope-zigujitogole.pdfIn PDF document text
    • http://files.catherinehoodillustration.com/uploads/1/3/1/4/131453484/rudipi.pdfIn PDF document text
    • http://files.therealblabbermouse.com/uploads/1/3/0/9/130969097/kevugakol.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/1/0500/1107/8814/files/waterdeep_dragon_heist_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1164/3304/files/northern_white_cedar_fence.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4405/2885/files/4489326191.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3991/8742/files/shape_earth_5e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1766/1339/files/rangers_apprentice_book_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9103/7859/files/bbc_iplayer_radio_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7003/7911/files/filekafakaxixajinij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1977/8720/files/moxaruko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0061/4040/files/zoxelinorasudarudu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4449/4750/files/32160192669.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4975/3507/files/xowoxawasuwapigag.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_off00007c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C50 5548 bytes
SHA-256: 0cacb20c62f7f7ac6ad5660246b5d727088b3681725c4c0981d69c7b0a805b0e
font_01_sfnt_off00008f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F23 10112 bytes
SHA-256: bb666c76c9c996b351b9d8b5274aae270a1aafd332a3324dffbb2841244b942a

Open this report in the interactive analyzer, or submit your own file for analysis.