Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2c5355790478f44…

MALICIOUS

PDF

44.9 KB Created: 2020-07-13 00:40:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: acc31260fa5ba5ee60519d65d44a36cb SHA-1: 554f83fa1421a6856a9a60e8c9314fab3467e7f5 SHA-256: d2c5355790478f44505296c263d8e3f32db93d34816a07810dc22c3993eac790
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains embedded links that redirect to malicious infrastructure, specifically a URL designed to appear as a search result for "Legrand circuit breaker catalogue pdf". The heuristic firings indicate a malicious redirector and a link farm, suggesting the primary goal is to drive traffic to potentially harmful sites. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/wb?keyword=legrand%20circuit%20breaker%20catalogue%20pdf In PDF document text
    • http://files.treesforhope.net/uploads/1/3/1/1/131163777/3163776.pdfIn PDF document text
    • http://files.jamicurtis.com/uploads/1/3/1/3/131398141/jifineworebufeko.pdfIn PDF document text
    • http://files.attorneydianebaker.com/uploads/1/3/0/9/130970014/3599882.pdfIn PDF document text
    • http://files.pemmensgolf.net/uploads/1/3/1/3/131379612/febokibilodirina.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://gefoguvokuru.files.wordpress.com/2020/06/wojilanevasuson.pdfIn PDF document text
    • https://zejamiwi.files.wordpress.com/2020/06/97185453586.pdfIn PDF document text
    • https://balebodi.files.wordpress.com/2020/07/5300369041.pdfIn PDF document text
    • https://rebepotare.files.wordpress.com/2020/07/temukamatasige.pdfIn PDF document text
    • https://valorenulemu.files.wordpress.com/2020/07/76615348752.pdfIn PDF document text
    • https://dabodurubavo.files.wordpress.com/2020/06/fikedigadivipi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70913092576.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/womonevixaxijebuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/vokedozepojagoxeko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wopesutokuvikoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/16064292371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5903401900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/seworaletig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xopiforosolakalaxelavur.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 8

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_off0000726d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x726D 5172 bytes
SHA-256: 4c682346d66ca23be4c3f752b1a6c72c66dc8255043bf2c954ea84c2ab227fe7
font_01_sfnt_off0000840d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x840D 10020 bytes
SHA-256: d2a6c2194b2dd2a620b16e2ed5a168983ca59b552999974122096462f99f6417

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