Malicious PDF — malware analysis report

Static analysis result for SHA-256 9893d3fc284053b3…

MALICIOUS

PDF

36.9 KB Created: 2020-11-03 11:08:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f257595a88eac70bb8e80463f9a5b703 SHA-1: 202330a1b5ee5bced86be229caec5e635581b1b5 SHA-256: 9893d3fc284053b3c2c1c081b6f4bd4cda2aabf6189fc86fba4ee8fdf9511254
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically identified as a redirector to malicious infrastructure. The document body, though heavily obfuscated, contains text related to downloading software and includes the malicious URL. The presence of multiple external links suggests an attempt to drive traffic to potentially harmful sites, possibly for malware distribution or phishing.

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/aws?keyword=pc+youtube+downloader+app+free+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389376/normal_5f9d97ecb1a73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371814/normal_5fa0ed5301d85.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/857ea7e6-d934-4a44-b737-e8e56eb4751c/gujexagefixok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/123f6ee9-d357-4d47-bf8f-3062e462bd0e/pokemon_heart_gold_randomizer_nuzloc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4797/4550/files/470-823-1353__-1706.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/8077/7373/files/zegazezetuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4332/2554/files/bigojubarupig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6641/6025/files/pokemon_let_s_go_pikachu_game_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/toxixeletabefo.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_off00005221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5221 5308 bytes
SHA-256: 142faf41069a0142983133d84b6dcc3dc22d8cffc8c923d5363021112121657b
font_01_sfnt_off00006450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6450 10200 bytes
SHA-256: 8aa3c8a64fa47718b438866fbbc5d018f61a6a0bb1ba24e870d25994208cdd4a