Malicious PDF — malware analysis report

Static analysis result for SHA-256 87015905c352aaf3…

MALICIOUS

PDF

51.6 KB Created: 2020-08-13 05:30:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3582d535166b2d5769a15ec220322ffa SHA-1: b1af91f5ba93d86ad9c2cbdb88030e61c1d0dc97 SHA-256: 87015905c352aaf3c197eb945aeae0f2e5f5dd3f998551c71c73afa2301c8e54
274 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector URL associated with malicious activity, disguised as a PDF editor download. It also employs social engineering tactics, such as a 'browser extension installation lure' and 'password-protected archive lure', to trick users into downloading and executing further malicious content. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=pdf%20editor%20download%20windows%2010 In PDF document text
    • http://files.poconohydrofarm.com/uploads/1/3/0/9/130969435/91eaeb76609.pdfIn PDF document text
    • http://gimopabu.shoplg.net/uploads/1/3/1/4/131482952/foxibujaf.pdfIn PDF document text
    • http://files.hope.cr/uploads/1/3/1/3/131381706/9337376.pdfIn PDF document text
    • http://files.ctslouisstlaurent.com/uploads/1/3/0/8/130814288/zagasigemis.pdfIn PDF document text
    • http://files.barronparkpreschool.com/uploads/1/3/2/6/132682090/96710796.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/1/0432/9085/3534/files/act_2020_20_test_dates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5956/0094/files/51190888834.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4523/1519/files/new_paris_metro_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wososopozabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0267/2798/files/jabefuzinusoronabedikar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67264452348.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3359/8880/files/86311659811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6710/4668/files/zapumibijimatus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7365/9292/files/23508359505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7209/3336/files/86439096731.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4293/8784/files/33714953874.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1863/3894/files/75930044197.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C63 5188 bytes
SHA-256: 97bb91483c8cefeb3095e21d50f28130285738a46db598fea63285ba79cde70b
font_01_sfnt_off00009e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E26 10376 bytes
SHA-256: 49034f27eac599a5b544bce1293f0f873cc3d60b39bae10b31fec9361af39f71