Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7368e7c3f7d7071…

MALICIOUS

PDF

37.7 KB Created: 2020-10-02 13:08:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b726a069eb469a7a85786e9a03eb5d02 SHA-1: 7d8ff614aad37d850f179c5579fceaf30333797a SHA-256: c7368e7c3f7d70716e32ecb72664cbec7cdd2136a0c207e9c034f6e72c234ff0
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document is classified as malicious due to its function as a link farm. It contains numerous embedded URLs, including one that points to known malicious redirector infrastructure. The document body, though partially obfuscated, contains text suggesting it is a lure for "Qlikview training material", intended to trick users into clicking the malicious links.

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.
  • 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=qlikview+training+material In PDF document text
    • https://site-1036695.mozfiles.com/files/1036695/83057922390.pdfIn PDF document text
    • https://site-1036779.mozfiles.com/files/1036779/zalidojedikomasilinujajam.pdfIn PDF document text
    • https://site-1037115.mozfiles.com/files/1037115/34755237381.pdfIn PDF document text
    • http://files.thestandardcanvas.com/uploads/1/3/1/4/131406344/9569317.pdfIn PDF document text
    • http://kelawugup.akirby80.net/uploads/1/3/0/7/130775181/3563319.pdfIn PDF document text
    • http://kejovu.businessdesignservices.com/uploads/1/3/0/7/130739723/nobuko.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/1/0465/1014/5694/files/nunubozimevetulax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/4860/3300/files/21362398692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9626/7168/files/vetukadod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83ad860d-fbbf-4c16-be73-1788c9b08dd8/86181222183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3e5d7e7-67e0-49a8-879c-cce2fc8955b8/14697703604.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_off0000587e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x587E 5104 bytes
SHA-256: f60b5e9620c79b310de3520527e0df9b678bff1198a6c8df85bab00001302e71
font_01_sfnt_off000069de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69DE 9556 bytes
SHA-256: 9d5dc8bae284826557e5e2fd405766043adfe31d19deda8038a5ad482ab97444

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