Malicious PDF — malware analysis report

Static analysis result for SHA-256 66eacf2b4cb01109…

MALICIOUS

PDF

42.2 KB Created: 2020-08-23 10:04:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b469c652e77969d4ddaa5bfc457e3246 SHA-1: 7c84fe63ee0aeeb646540588a42f99c8111e3b53 SHA-256: 66eacf2b4cb01109883f2ec32ffdeba8e327af5182575832b5c5143b789fddd8
234 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service that appears to be part of a link farm for SEO purposes. The document also includes instructions for a password-protected archive, a common tactic to bypass gateway scanning. The ML classifier strongly indicated maliciousness, and the presence of redirector links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.com/pify?keyword=brutus+aet2+password+cracker+free In PDF document text
    • http://files.taaonline.org/uploads/1/3/1/4/131438778/robivowaximoxoj_rakik_logebedex.pdfIn PDF document text
    • http://files.chelseagsps.com/uploads/1/3/2/6/132683165/razubagorep.pdfIn PDF document text
    • http://ninejupo.clarysageconsulting.com/uploads/1/3/1/4/131454165/zajarulasenugonona.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/1/0433/8555/3061/files/belonop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7296/9109/files/balapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6533/4165/files/7310588020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2427/7923/files/united_state_address.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9963/4330/files/clavier_qwerty_en_azerty_sous_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6411/2805/files/58158556283.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/67249737641.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/lozupexuvokekalemipadore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/43019266456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5864/0549/files/biodata_form_philippines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7716/3426/files/92937012111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9453/1493/files/discord_delete_dm_history.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_off0000672d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x672D 5456 bytes
SHA-256: 290774a9223cb2fd813243a3bab5124f1fb4b1fe6c1c4490a316d98272b6b9d5
font_01_sfnt_off000079e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79E7 10008 bytes
SHA-256: 3010953ad22909bfc7e2c8ae03bbe7182471a9b90875f106e46bef2580d14956

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