Malicious PDF — malware analysis report

Static analysis result for SHA-256 505993691af9950d…

MALICIOUS

PDF

43.8 KB Created: 2020-08-23 18:52:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4f8d0cfbc214ab479aa8ff41dac06a3c SHA-1: ac55490b6aa15971406e0b7152e94f2b980d850a SHA-256: 505993691af9950d3be6912e5c930e08da937c78028ff94c465caad009adca70
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious intent, including links to a known redirector and a large number of external links designed to appear as legitimate content. The document body, though obfuscated, contains a URL that is also flagged as a malicious redirector. The presence of a browser extension installation lure suggests a social engineering tactic to facilitate malware delivery or credential theft.

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.
  • 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.com/pify?keyword=android+tv+remote+ios+not+working In PDF document text
    • http://files.tucsonccr.org/uploads/1/3/1/4/131437599/mawafo.pdfIn PDF document text
    • http://files.kaimodeling.info/uploads/1/3/0/7/130775845/8944175.pdfIn PDF document text
    • http://kufojewo.laurenkellyontheroad.com/uploads/1/3/1/4/131406390/suzid.pdfIn PDF document text
    • http://files.brbestdressedball.com/uploads/1/3/0/8/130813841/woxopetapugarak_befiladefeneta.pdfIn PDF document text
    • http://files.gemscorner.org/uploads/1/3/0/7/130775905/d0d68910.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/1/0438/0921/0529/files/blocking_anticyclone_formation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5331/8298/files/68392332956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4719/7594/files/gifajegefiban.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1304/4386/files/alphonso_dunn_pen_and_ink.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0753/1414/files/mujuzomamezimizonoweturov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7578/9215/files/10745184278.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1610/8707/files/cheryl_yung_gravy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/auto_accident_report_form_massachusetts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0206/1215/files/dynamic_stretching_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0654/8377/files/2467771632.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9348/9832/files/51960772058.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9173/9295/files/kumeludawegivaxapifezaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9600/7065/files/xolaguxedom.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
🗂 Part of campaign: brbestdressedball.com 3 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D17 5108 bytes
SHA-256: 34a1147b283d8d66098938721d78c9e4babea06e30015b2828cdb224080dcef7
font_01_sfnt_off00007e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E7B 10480 bytes
SHA-256: d17ed7319e4cb9bc04437898dbc22cb018b0135d8e02705d183042c05fd717d8