Malicious PDF — malware analysis report

Static analysis result for SHA-256 b33e9b4c5bd4ee94…

MALICIOUS

PDF

41.3 KB Created: 2020-11-03 10:03:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1c8e272880f43bc793d56072dc0d2694 SHA-1: 3372ce3916734ae80a9bad1e1d1ff3a17614118b SHA-256: b33e9b4c5bd4ee9418e64498211088dd79e42de38a2d31f41e22a80f3a2821d0
134 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristics. This link, 'https://ttraff.link/123?keyword=locust+grove+middle+school+henry+county+ga', is designed to lure users to a potentially harmful website. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of the redirector suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.link/123?keyword=locust+grove+middle+school+henry+county+ga In PDF document text
    • https://kafasomawupi.weebly.com/uploads/1/3/0/7/130775431/wewuwokumapobo.pdfIn PDF document text
    • https://mivoxoxez.weebly.com/uploads/1/3/4/3/134340481/a5c1e1fba28d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384308/normal_5f93ee49a727c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374532/normal_5f8a05be7906e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/command_for_invisible_block_minecraft.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/badminton_set_walmart_usa.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/logos_pathos_ethos_definition_literature.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9970/8821/files/92226142302.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/renaissance_periodization_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/mitifozuminegegimu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e9b11c3-9d51-4651-89ba-c165253d543c/71952470307.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4991/7333/files/diwalowoxabirozaluku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3071/5805/files/drop_down_menu_screen_android.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_off00005e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E61 5456 bytes
SHA-256: b97be8f97fa9da9b2b8d53b84f6d9845a450575d769a44fa60e7a81f4c690121
font_01_sfnt_off000070d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70D2 12404 bytes
SHA-256: 5d5e24aab936bf9b2b0e7769e107c5c0101ffb0e4b3cf2867acbefe528cabf91