Malicious PDF — malware analysis report

Static analysis result for SHA-256 b42229f065e50bde…

MALICIOUS

PDF

43.7 KB Created: 2020-10-04 13:32:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ce7dc83a30614692138a916e4116af5c SHA-1: 8a84944b30cc787fcd23f5624bc4225478d5e4bd SHA-256: b42229f065e50bde7e4adeb588a04860301c8cc9f3f71c5fca9704acc6938f8a
162 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains numerous links to external PDF files, indicating a link farm or SEO spam campaign. One of the embedded URLs, 'https://gettraff.ru/pify?keyword=how+to+center+text+in+photoshop+cs4', is identified as a known malicious redirector. The presence of a 'download button' lure further suggests a malicious workflow, likely intended to drive traffic or distribute further malware.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=how+to+center+text+in+photoshop+cs4 In PDF document text
    • https://site-1039444.mozfiles.com/files/1039444/jakutosefisinadu.pdfIn PDF document text
    • https://site-1043239.mozfiles.com/files/1043239/tukuledi.pdfIn PDF document text
    • https://site-1039259.mozfiles.com/files/1039259/58383544989.pdfIn PDF document text
    • https://site-1038779.mozfiles.com/files/1038779/85479840204.pdfIn PDF document text
    • https://site-1036733.mozfiles.com/files/1036733/sevore.pdfIn PDF document text
    • http://kajudo.serenaremy.com/uploads/1/3/1/4/131408168/wepif.pdfIn PDF document text
    • http://files.dietitiansinthekitchen.com/uploads/1/3/2/6/132695213/jiwimid.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/1/0430/4466/7553/files/vuwikonaxafurarubekopige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/kakute_f4_aio_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3470/0694/files/sumitakawaxokowowonusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7124/2389/files/63635388449.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1423/2984/files/85404798668.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0008/4126/files/digowumomokevebum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/8067/9064/files/the_osmond_family_now.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_off00006107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6107 4776 bytes
SHA-256: 9060b61bea8ee19f06878c9654b355df79e233dd0222bf1e4803f02b7d95ab6c
font_01_sfnt_off00007146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7146 9980 bytes
SHA-256: 87055fd2ca91783b0e032a577378ffd0b8ba227807e7571a3135456cfb24e751
font_02_sfnt_off0000936a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x936A 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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