Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c40bfbe80333636…

MALICIOUS

PDF

41.9 KB Created: 2020-11-03 05:21:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a27a9a2ae1176ce7378332b4df7822e9 SHA-1: 36ea92f72aab391e0281a2e28920b78bd866a83c SHA-256: 5c40bfbe803336368bc545d8ef1ff0d43b57793f232cf8735ab627f4ad87c9fb
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a link to known malicious redirector infrastructure. The embedded URL `https://ttraff.me/123?keyword=north+valley+high+school+grants+pass+football` is the primary indicator of malicious intent, likely serving as a lure for phishing or malware delivery. No scripts were extracted, but the presence of a malicious link strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.me/123?keyword=north+valley+high+school+grants+pass+football In PDF document text
    • https://cdn-cms.f-static.net/uploads/4391899/normal_5f9f1225ab33a.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/1/0501/8258/6520/files/zofakodujufagovadox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1614921-31f2-4c10-9148-834eb0f244f6/honey_select_pregnancy_mod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/2879/1463/files/86358304694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4666/5382/files/pikotirav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b76b4c1-5560-458c-82a0-6c9e66de6156/doro_7050_manual_of_symbols.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50725ca1-6efc-465a-97c7-a2b9b8e2538e/copperplate_calligraphy_guide_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6990f7f-96b2-4e9a-a1b3-a3dd13bccdc9/24168529939.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2404/2142/files/sammamish_river_trail_closed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/738e7d8e-475a-4883-b335-09f74b39f791/wupisedubejovovuxutubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2717/5873/files/33407040676.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5d3f5a9-8f41-423c-b00f-0d5cc849d3ad/61350644823.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_off00006282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6282 5548 bytes
SHA-256: 5df4f7535c0ea602109224553b3ea02883a45ab09f8c7710dbedf7b907c3deb1
font_01_sfnt_off00007578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7578 10992 bytes
SHA-256: 5ac3f682b65d3350be2842b5440e8ae0f092ee6523cbb1d643bbff0cacedb348

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