Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e0d4d8b30dd0806…

MALICIOUS

PDF

54.1 KB Created: 2020-09-21 04:50:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 5162b348b658c799dd5fe3b3fe49ce0a SHA-1: b86dd677dc7f3bdd7be84faf37cb148cebe7ed15 SHA-256: 3e0d4d8b30dd08061215263f50f0296a646075dfa5196911b180450b8d31c528
194 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to redirector infrastructure. The primary redirector URL is https://ttraff.me/wix?keyword=7+levels+of+classification+worksheet, which is associated with a link farm designed to lure users into downloading further malicious content. The ML classifier strongly indicates maliciousness, and the document body text, while appearing educational, is a pretext for the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.me/wix?keyword=7+levels+of+classification+worksheet In PDF document text
    • http://madowaso.stseachnalls.ie/uploads/1/3/1/3/131398222/3478058.pdfIn PDF document text
    • http://files.arlab.co.uk/uploads/1/3/1/3/131398008/327819.pdfIn PDF document text
    • http://files.thebikemedics.com/uploads/1/3/2/6/132695280/watekova.pdfIn PDF document text
    • http://gezumu.52choices.com.au/uploads/1/3/1/1/131164021/68318d8207b.pdfIn PDF document text
    • http://wulezad.seeaparis.com/uploads/1/3/1/3/131398134/162132362fbbd49.pdfIn PDF document text
    • http://files.fortbraggheadlandsconsortium.org/uploads/1/3/1/4/131437885/4910804.pdfIn PDF document text
    • http://files.staceygschwartz.com/uploads/1/3/0/7/130739697/toxutagija.pdfIn PDF document text
    • http://najufid.bcassandra.com/uploads/1/3/0/7/130776415/bbaf7454efa87.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00009742.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00009742.bin)
    • https://cdn.shopify.com/s/files/1/0486/2905/5653/files/free_bubble_sheet_grader.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7583/6835/files/aerobic_endurance_training_improves_soccer_performance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6335/3244/files/xuzofot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8353/8340/files/alice_through_the_looking_glass_putlockers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7596/8928/files/tixodagitegaxosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0501/6226/files/ropukosuwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3874/4469/files/83472546474.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 extracted file (font_00_sfnt_off00009742.bin)

Related samples 6

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_off00009742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9742 5172 bytes
SHA-256: d3f3f00a48c2b323264ea53282f4da9efe35233a806d94c6ec6fd283ad67b39c
font_01_sfnt_off0000a8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8F1 10140 bytes
SHA-256: 1d98591e18d03d1e06927bd3e388f9b9a58f3bfd7b01b908e1345b4b18d06e1d

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