Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e060360eed9ec75…

MALICIOUS

PDF

51.2 KB Created: 2020-10-15 15:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8adefe7bf8a8bceb336b8cc0f1168a6c SHA-1: 0e14c9bf72401ddebbfb10db3e3c3de77e92ff0c SHA-256: 4e060360eed9ec750942ccf0ceb33c90781bb8466f40f11b03345eb510dfe128
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for users seeking instructions. The ML classifier strongly supports the malicious verdict.

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://ggtraff.ru/123?keyword=rit+clothing+dye+instructions In PDF document text
    • https://site-1040618.mozfiles.com/files/1040618/vemawojazu.pdfIn PDF document text
    • https://site-1038427.mozfiles.com/files/1038427/11692695404.pdfIn PDF document text
    • https://wurikosaradusif.weebly.com/uploads/1/3/1/3/131384544/besazisiroz_zasepezisobot_gaxelegufepob_rimifep.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/2c41886a7012.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/717d15148.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/jezuteredaburex.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/nojof.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/1/0432/9832/4638/files/pokemon_ultra_sun_and_ultra_moon_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/1813/6995/files/emergency_and_critical_care_pocket_guide_acls_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3144/4128/files/24799896692.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e93106bb-5f79-4d9e-b0f2-8e1a6644f67c/18469718102.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/453fa482-d983-44cc-acbc-4701c6c49d66/xufutujimuvoleki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52476ad6-c2fc-4aea-9f6e-cb758a298a54/48882208583.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5575/0049/files/capacitive_deionization_ppt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0641/8331/files/954285399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2702/8375/files/xorelejuliseson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2899/9065/files/vujebin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2315/4850/files/47729721169.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eaa6469-ff08-44e6-8914-91a16da0e58d/lebamagudaronukiruwure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f947f97-b624-4d65-b952-e48192244270/99306598454.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_off000089a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89A5 5100 bytes
SHA-256: de07d4a386ce799aa717938fa9bd5568c5cd55fc15ba6b3c149ed1f7773a289e
font_01_sfnt_off00009af8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AF8 10652 bytes
SHA-256: a80b8eb9ddf308bf6da6cb3f1984ed84dac21583fb777e8e7b5eb7a100b792ce

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