Malicious PDF — malware analysis report

Static analysis result for SHA-256 417e78a31fe69b0e…

MALICIOUS

PDF

43.1 KB Created: 2020-10-08 03:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e16c836b40d65998ddf8d5309c99291b SHA-1: d78b0f4e1e9f3126cfee3d155ef911a0b69b30d9 SHA-256: 417e78a31fe69b0e56b144b72a7c67a57f16e41895f8049e8601269c4bb0baa9
132 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure for 'Adobe premiere tutorials'. The ML classifier also strongly flagged this PDF as malicious. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/strik?keyword=adobe+premiere+tutorials+malayalam+pdf In PDF document text
    • http://rovoxelig.splashsteamboat.org/uploads/1/3/1/4/131453526/fipesoja.pdfIn PDF document text
    • http://bemupizi.chiricopt.com/uploads/1/3/2/3/132302855/nabidegaxerebuw_radagujexibid_zudujewotaj.pdfIn PDF document text
    • https://site-1037273.mozfiles.com/files/1037273/84579508489.pdfIn PDF document text
    • https://site-1037283.mozfiles.com/files/1037283/13831909483.pdfIn PDF document text
    • https://site-1037196.mozfiles.com/files/1037196/6244680533.pdfIn PDF document text
    • https://site-1042264.mozfiles.com/files/1042264/7315761080.pdfIn PDF document text
    • https://site-1038421.mozfiles.com/files/1038421/21192613281.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/1/0469/4527/1969/files/biotechnology_worksheets_activities.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6955/4329/files/96926073833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3674/0264/files/dsp_manager_dan_equalizer_pro_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87648bad-d846-45b0-92ed-646d4a586cbd/xajuzisiwol.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_off00006a18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A18 5420 bytes
SHA-256: 47ca086867a9555a442a1ad4b28038d06641395ff619a9533a15bc620251db45
font_01_sfnt_off00007c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C6E 10176 bytes
SHA-256: 9709bce3e3c069febf6beea58af81ed9de5c3a97e76a4a2cc3fd2d6e532e583b

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