Malicious PDF — malware analysis report

Static analysis result for SHA-256 60eb802fa3f25954…

MALICIOUS

PDF

54.5 KB Created: 2020-10-28 16:35:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f13de64b4248e30cd30c90b1c9f44373 SHA-1: 964de61355e7314efd66b247a71c878fe1b350d1 SHA-256: 60eb802fa3f25954a03c763177bbffad14bb3500a71164f86147f5a568d0edaa
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a significant number of embedded links, many pointing to disposable hosting and one redirecting to known malicious infrastructure. This suggests a link farm or SEO manipulation tactic, potentially used to distribute malware or phish users. The ML classifier also strongly indicated maliciousness.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.club/123?keyword=how+to+calculate+entropy+of+vaporization In PDF document text
    • https://vepezifu.weebly.com/uploads/1/3/4/2/134265798/95003434e69f6.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/c8a358dd5c9b.pdfIn PDF document text
    • https://rokozozo.weebly.com/uploads/1/3/4/4/134498035/1627622.pdfIn PDF document text
    • https://fomomeku.weebly.com/uploads/1/3/2/7/132712435/f1e2437bae7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5f8b5b11e175c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384483/normal_5f989af3245dd.pdfIn PDF document text
    • https://dozasasakebo.weebly.com/uploads/1/3/1/1/131164234/fedigupemutejajepolu.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/1/0434/3254/2369/files/56906608450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daa6e18d-f10c-4979-89e0-a6171de31fe1/pulesojodeguw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1188/1136/files/pulmonary_artery_thromboembolism_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeba58d3-e507-41d1-ada8-4f4b87066c58/dozibiterabad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2df15276-8c22-4d0f-9ca7-9dbf47803d76/papoxevitixoromupuse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cfa03f4-87bf-4e86-b9f5-e62807c12646/28105216368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24ad6834-246c-47c1-831a-54bc9b46d94c/68686476314.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5194/8963/files/41787990751.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2773/3912/files/sonic_cd_apk_obb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00dc2307-7738-4a03-b698-cec2386947dd/fefuwiwirixoteso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af4b3dc7-810a-4a99-be75-d420d7ea5920/76053397458.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3986472a-34bd-4164-bc48-a8f595fbb42c/48957818108.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14441b09-0b2e-4371-8c6f-3ee090fc0225/powiralakobunofijop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaa1d54d-73b7-4e20-b8d9-f40498fcb9af/kevikelovobitedodusavis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b41ffd6-cafe-4914-b1a1-1c28c3ea8bfc/dijepisabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb779c88-dde8-4ac8-9e42-ab7730cc66f3/28633058504.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baf63d1a-269b-4652-8052-0e89a405ca36/54384044710.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8401 4976 bytes
SHA-256: 2deab7e90dc1610a117a5a9d76f32ae1c3b195b75aa26cae039518da0fcd726e
font_01_sfnt_off0000951c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x951C 12464 bytes
SHA-256: 5753137c0d97fd2b851c933e63bf991b804077304bf91fd0ac546c94da64833b
font_02_sfnt_off0000bdba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDBA 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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