Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd8498576b6474c…

MALICIOUS

PDF

40.7 KB Created: 2020-10-29 12:48:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0a044c47331e615ee5bf969110576521 SHA-1: e6406ca0c4d801be34e1afe6428a7631e021a2c9 SHA-256: 9fd8498576b6474c0d0415e3c41a4069ae9e73d2b7fbfa3f798b2b4c62640b7d
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The presence of a large number of external PDF links suggests an attempt to manipulate search engine results or create a link farm, ultimately directing users to malicious content.

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://ggtraff.ru/strik?keyword=cool+maths+games+animal+raceway In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381964/normal_5f8d211aec4ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414691/normal_5f991c5ba04e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f8703bb66e18.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/439d7fe7-6d76-4cf2-8040-4319795a7a50/30771259138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4689/4240/files/resuzejufoxaxorifif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4647b156-a28d-4430-97aa-23be1f50c4d2/sabaxonewivonodekajesiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64a76d82-2156-4e01-ab3c-e6ea093d415a/47074382901.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3c9cac3-21b2-4ee5-836b-86fecf866886/nexewiwazonegirajovikeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6a0df93-2afc-46c2-a867-37f0a0bd1dda/imagimorphia_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d74c419-0255-40bd-8519-1f85c73ff3a4/74190434412.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3353b8d-c532-4796-9ebf-def14643ad82/jesujudi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4723/0883/files/81663918524.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcd5bfbd-ed5d-4905-a548-78a14a4103b5/27584448646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/3614/9413/files/98117611236.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7611ef81-04a0-4411-9642-8d6a4cd43a43/bat_box_san_pedro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7669/7246/files/wazazubezolivoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fd163d1-ff0b-48fa-8dd9-e7a78902432d/kolasusedosudoxigup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce94e9a6-3038-4a04-9460-cd6a7b9fafcb/xamifufasogivelasuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/204c66c0-2799-411c-bb8b-abd41268964f/greenhouses_for_homeowners_and_gardeners.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB8 5312 bytes
SHA-256: c416b375b51c9f544c2c68a1a8487447d9e24d612878986eff7dae53adaf233c
font_01_sfnt_off000071a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A9 10584 bytes
SHA-256: f06a13f0cb8459eb3c3e1dc08a0a9f4e136c6ac9550a0ab94d70b447f31c6402

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