Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fba96533654a974…

MALICIOUS

PDF

52.3 KB Created: 2020-11-03 05:04:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 224b1eac68f2461b028c09992928b30c SHA-1: 34776b5774b5af548830817e78386e6403c9ffb5 SHA-256: 6fba96533654a9742aac56033000bcc8f5b391e14868421868a35531c5a6ac94
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains numerous embedded links, many of which point to redirectors and SEO link farms, indicating a malicious intent to drive traffic to potentially harmful sites. The primary redirector URL, 'https://ggtraff.ru/strik?keyword=check+mark+symbol+in+excel+2013', is flagged as malicious. The document body, though heavily obfuscated, also contains this URL and other benign-looking PDF links, suggesting a lure for users to click through to a malicious destination.

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://ggtraff.ru/strik?keyword=check+mark+symbol+in+excel+2013 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370073/normal_5f9c695aee98b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367299/normal_5f8f6c9f118cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392237/normal_5f9f2d640773f.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/bewoti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448343/normal_5f9e60aedc29c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0571/2296/files/wevuwuposufupazip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0777/0263/files/san_jose_state_majors_gpa_requirements.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/0659/8557/files/dolulekituwezuvon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce1ef44f-a173-48ae-a8b4-eb8e2d7a4db5/14329275694.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d22966f-003a-4f55-a1f4-5ee0bf83bf18/1032917727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/0950/7229/files/sandia_peak_10_day_weather.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67E1 5636 bytes
SHA-256: c3c58e54e906871e3433d5a57bbec30e1d63ed4bc71af2dab53bbba13ddbc17f
font_01_sfnt_off00007ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD6 10652 bytes
SHA-256: 6e8f9510f001dd0b0cfbc85aa1153c2bb45a2c2cd8d7f46f81f696c45fa7dcae
font_02_sfnt_off00009f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F0B 16588 bytes
SHA-256: 8a867f6ea2841e0a61a6dd43f854be24cce5bb9b51ed8840e6a59b670fe6293e
font_03_sfnt_off0000b5c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5C5 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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