Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ce468d90894495…

MALICIOUS

PDF

60.2 KB Created: 2020-10-01 05:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f95945324cb41fe748dcfa1f9e347ff7 SHA-1: f0ae991b0c9b56507f170d5b8b9fe1d6475db309 SHA-256: f7ce468d90894495e7bdc6cc4bb6ce538c45a6ce210badb6d46a59379ad70e59
124 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically 'https://gettraff.ru/strik?keyword=al+capone+does+my+shirts+test+pdf'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to the malicious URL, reinforcing the intent to redirect the user to a potentially harmful site.

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 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.
  • 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=al+capone+does+my+shirts+test+pdf In PDF document text
    • https://site-1038338.mozfiles.com/files/1038338/89628255666.pdfIn PDF document text
    • https://site-1036728.mozfiles.com/files/1036728/34778170442.pdfIn PDF document text
    • https://site-1037149.mozfiles.com/files/1037149/18376784313.pdfIn PDF document text
    • https://site-1036851.mozfiles.com/files/1036851/javagapupaxabuzizirij.pdfIn PDF document text
    • https://site-1037124.mozfiles.com/files/1037124/guxowifazewazom.pdfIn PDF document text
    • https://site-1037169.mozfiles.com/files/1037169/91436472519.pdfIn PDF document text
    • https://site-1036969.mozfiles.com/files/1036969/jinakojuwidakuwu.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/1/0439/2442/2811/files/booklet_template_in_word.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2036/9576/files/53688546468.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/94184649944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3860/4450/files/55930939509.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6896/4520/files/batasodukobovazibidisag.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8366 2944 bytes
SHA-256: d97033cbd1e214d7c0a795f951dc9788d555bb387f6df08e5a1735a47c9c0f00
font_01_sfnt_off00008df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF3 5484 bytes
SHA-256: ad3058bc6eb9fcb9e55fa10915781a7eb81672c6395b34e9474acb1929e38796
font_02_sfnt_off0000a078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA078 15636 bytes
SHA-256: c09d10ca834cab0c2d0bd01ed89c81bedf0182e8862962feb9e1fdfdc0101537
font_03_sfnt_off0000cbb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB5 16628 bytes
SHA-256: 9055d4db35e69c0b9fda0b6fa99b4182bb27609f95d4d4dae62878b81a41bb20

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