Malicious PDF — malware analysis report

Static analysis result for SHA-256 78b2f52759f487ca…

MALICIOUS

PDF

43.9 KB Created: 2020-10-24 00:59:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e9ea7180750cddea430c5464e582750d SHA-1: c62343d5db84dd1ab4a85e702837b34fb71ab9db SHA-256: 78b2f52759f487ca9e434cd9922231cfeba9493d7b3bb3560d6774742ccff297
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged this PDF with high confidence. While no scripts were extracted, the presence of the malicious URL strongly suggests an attempt to lure the user to a harmful site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://gettraff.ru/strik?keyword=alesis+midiverb+ii+effects+list In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f871eb273cbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393179/normal_5f8f876e54bbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368249/normal_5f8ea8845e87b.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/pazifetanegapu/96467575140.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/mavifelamebejit.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/wurapodiselowumirofavatep.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/public_policy_making_process_in_the_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/pexirajoxutuwusixan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4440/2842/files/jomizekuwubuzobos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3507/3943/files/98403112060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5670/1346/files/download_boxing_star_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/4676553356.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2c17f5c-1660-42a9-8150-623755ba4ab9/jotegixikog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aac83090-2ac5-40c5-9a8b-4e40e8b26742/jarubokekol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22c3f19e-c5b4-4a3d-95ce-d4f60e932e4e/28084419345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70c9573a-ea8e-4903-b200-bf447f62f9ea/407799225.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2000/4761/files/wosakikuwugujewobejis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5468/5077/files/17295915542.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cd3ffd6-96a7-489c-a209-68e985fc0aed/14443304241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da1370c9-c764-41ce-ab29-35869775078f/birorovexixudopixoripunet.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1A 5144 bytes
SHA-256: b46af17d1a5fa75f9909fd77346e42f9fbb7f4319543282bae6e8e5b932a9bd7
font_01_sfnt_off00007e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8E 11328 bytes
SHA-256: 1a0128f2c6a59330f38ecd564e652a5bc3f10c10fc6258980b73db8d3e26d0a1

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