Malicious PDF — malware analysis report

Static analysis result for SHA-256 022a301ead6279b0…

MALICIOUS

PDF

41.9 KB Created: 2020-10-01 14:46:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: caecdffe3d88756e2ece334bd56571fc SHA-1: 381293beb9148ebc96b1966934516d8eb314bd57 SHA-256: 022a301ead6279b019a87b851c1a16585924267e71caef6264bca021e7939800
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, identified as a link farm, which is a common tactic for SEO poisoning and redirecting users to malicious sites. The primary link found in the document body, 'https://gettraff.ru/strik?keyword=convert+adobe+pdf+file+to+word+free', is also flagged as a malicious redirector. The ML classifier strongly indicates maliciousness, supporting the conclusion that this PDF is designed to lead users to harmful content.

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://gettraff.ru/strik?keyword=convert+adobe+pdf+file+to+word+free In PDF document text
    • http://mafiw.libbyes.com/uploads/1/3/2/6/132695569/fureg.pdfIn PDF document text
    • http://xufax.inkonivory.ca/uploads/1/3/0/8/130873782/6620083.pdfIn PDF document text
    • http://revidujoj.broadwaykennels.com/uploads/1/3/1/3/131379706/81d2135ec6.pdfIn PDF document text
    • http://welodak.generationxgoesglobal.com/uploads/1/3/2/6/132695643/jofepoxidoma_sogekomumu_ludeliz_vuroju.pdfIn PDF document text
    • https://site-1036680.mozfiles.com/files/1036680/22590621758.pdfIn PDF document text
    • https://site-1039190.mozfiles.com/files/1039190/mefazefesezojakibulovof.pdfIn PDF document text
    • https://site-1037266.mozfiles.com/files/1037266/depunoxitomika.pdfIn PDF document text
    • https://site-1037005.mozfiles.com/files/1037005/20286309731.pdfIn PDF document text
    • https://site-1036628.mozfiles.com/files/1036628/18083107227.pdfIn PDF document text
    • https://site-1038709.mozfiles.com/files/1038709/noniwafeteruxujasutetawo.pdfIn PDF document text
    • https://site-1036640.mozfiles.com/files/1036640/69003289935.pdfIn PDF document text
    • https://site-1036918.mozfiles.com/files/1036918/saxukijotujexi.pdfIn PDF document text
    • https://site-1037113.mozfiles.com/files/1037113/lefijij.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/1/0434/3031/4151/files/kejazabixaxumijikepimaka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1144/4634/files/41938008949.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2130/2935/files/download_mod_game_clash_of_clans_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8522/6403/files/mathematics_in_the_modern_world_book_philippine_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9461/4940/files/powemavanaw.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_off0000667a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x667A 5056 bytes
SHA-256: 21823bb13567b8a380090557d400fbca13819cd20c2dec20d3c0aab92acc9322
font_01_sfnt_off000077ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77CA 10028 bytes
SHA-256: df799b62482a11d6f685616f4f413dbbcc35968b63f0088f49f316a0fd293eb1

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