Malicious PDF — malware analysis report

Static analysis result for SHA-256 b28d3b4e8162a19b…

MALICIOUS

PDF

35.3 KB Created: 2020-10-28 18:57:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 843ba6dd63ce7a35647e34ba7218fd48 SHA-1: d6c06bd42e3f0eb9813430a5409ce7756e7d13a5 SHA-256: b28d3b4e8162a19b7be095206e8235605d4d51d38373ffe9589f1c74721f7dc6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure. The presence of a link farm and a malicious redirector suggests an attempt to lead the user to a compromised or malicious site.

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.
  • 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.
  • 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=forever+chris+tomlin+chords In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5f8de54ab1388.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367645/normal_5f89b49a955d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367622/normal_5f8aeca79def4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f8dc5e9f223a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/22748a19-7122-429f-a267-986ea865be6b/78906650992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32e187f5-641f-4f03-8acc-ae670cd02a17/66617450417.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/autonomous_research.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d03cf19-4d18-4acb-b877-6df1c1f181e2/zipanegaxubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4351/1706/files/dadasanakizifupidodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7261/3280/files/weed_firm_2_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1724/6632/files/smart_spoken_english.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/antibiotic_sensitivity_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7001/9994/files/lesoner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66a80038-05d2-40b4-94fe-92eff1d2a1cd/dave_east_paranoia_2_zip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9861/2918/files/vector_game_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/45567220256.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7967/4272/files/ranefini.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7498/9479/files/somitibeso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d270811a-4059-49fa-a271-e44374ac95f7/ark_cant_download_survivor.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/adjectives_worksheets_for_grade_6.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0790/1335/files/deadpool_2_google_docs_mp4.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_off00004e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E2B 4984 bytes
SHA-256: 53d28e11f5eae4f338b0f7ebbcfeba52954934ab85439bacc34c71dc48251e2f
font_01_sfnt_off00005ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF9 9736 bytes
SHA-256: 2c6550956bfe3d73499bd57beeb784632a59dc233e66e3b0a0995b13a2b491ff

Open this report in the interactive analyzer, or submit your own file for analysis.