Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecb56f7f49ce776c…

MALICIOUS

PDF

52.9 KB Created: 2020-08-01 20:40:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a8af8c278a5e289bfb660e37b6feb38f SHA-1: b358ab4c96416e0103886e4009e6a8d3b3964098 SHA-256: ecb56f7f49ce776c722e83f6e600b7031988650d325050ce70d3022c8008de84
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it's a malicious redirector and part of a link farm, specifically pointing to a URL designed for SEO-based phishing. The embedded document body, though heavily obfuscated, contains the malicious URL, suggesting the document's primary purpose is to drive traffic to this malicious site. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/pify?keyword=montana+state+abbreviation In PDF document text
    • http://files.lemonteilrevolution.com/uploads/1/3/0/7/130739678/dabimikanupitiv_fegowojidomet_mixufudap_pasuf.pdfIn PDF document text
    • http://files.communitybuildersnz.org/uploads/1/3/0/8/130814017/7709716.pdfIn PDF document text
    • http://files.plantshappen.com.au/uploads/1/3/0/7/130775537/6ef6821835d4.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/1/0428/5402/3327/files/69899884254.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/dubawibuborulisububizegom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1907/4712/files/gunite_cross_reference.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9128/7452/files/zuzirir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2381/8139/files/33996223951.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/jewuleg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5565/0718/files/vivodev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/boguxexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/97147047885.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0090/5373/files/27234333462.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0933/5715/files/xoxeso.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_off000087ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87FF 4852 bytes
SHA-256: 025ac66651b74448861d77e03b1e218ef3fccfbd88580a94676905d8277c248c
font_01_sfnt_off0000989e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x989E 15000 bytes
SHA-256: b01b9a9b60eb24a4584408a9f80cefe9682ed4d51c707b836d9dc8c7e6363c23

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