Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2efcd2f38bf8ca8…

MALICIOUS

PDF

35.8 KB Created: 2020-10-07 03:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0652223500d118d4a14aca3c24a9df19 SHA-1: 60bbc426ca1e8678eebd9fa363b66bdb034e5b9d SHA-256: d2efcd2f38bf8ca87a9b6d5a72453a68719152bf19b6397dff85fb4ba233f791
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text and URLs that align with the heuristic findings of a link farm. This suggests the primary purpose is to direct users to potentially malicious or spam-related websites.

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://cctraff.ru/strik?keyword=algae+is+a+primitive+form+of+life In PDF document text
    • http://files.miracleministry.net/uploads/1/3/0/7/130775400/dizoja_zupobukomu.pdfIn PDF document text
    • http://files.elpasoalfalfa.org/uploads/1/3/0/7/130776381/115658.pdfIn PDF document text
    • http://xaruva.max-russell.com/uploads/1/3/0/7/130775403/zegujewoxejamat.pdfIn PDF document text
    • http://tubitox.heidiaphroditejewelry.com/uploads/1/3/0/7/130740323/897127.pdfIn PDF document text
    • http://files.rebelliousrheaboutique.shop/uploads/1/3/1/4/131406413/2090860.pdfIn PDF document text
    • https://site-1038777.mozfiles.com/files/1038777/fajetatipavavilonesopu.pdfIn PDF document text
    • https://site-1039301.mozfiles.com/files/1039301/matozesitetotik.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/1/0492/0118/4931/files/juvujovotexifegozuwibaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7920/2984/files/subaru_forester_lift_kit_2009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5795/5494/files/nawuziwutawuvomefiwavom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9245/7112/files/jungle_book_play_script.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_off00004ca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CA7 5268 bytes
SHA-256: 618b6a5cdfe8ce48a8bf7513d09d52d291b738534cef34fb249cd237469fa564
font_01_sfnt_off00005e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8C 10868 bytes
SHA-256: 34f740c7d744033668a9291f2bdc979a983421e3433a33e3da632701c3182938

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