Malicious PDF — malware analysis report

Static analysis result for SHA-256 392bff6b1daeec6a…

MALICIOUS

PDF

61.7 KB Created: 2020-08-20 19:50:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5444daef83b33ad3ca3894df515aafb6 SHA-1: 1361723ccb688f0b9a113671b6fc3150d0a52bab SHA-256: 392bff6b1daeec6a65a94f2085729efa07307016666a94be9dd4fd8d87f6379d
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one specifically identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting an attempt to manipulate search engine results or lead users to malicious sites. The presence of the malicious redirector URL further supports this. No scripts were extracted from this sample.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ttraff.ru/pify?keyword=emerald+tablets+doreal+pdf In PDF document text
    • http://files.martialedu.com/uploads/1/3/1/6/131636990/muteki.pdfIn PDF document text
    • http://files.eghsfinearts.com/uploads/1/3/2/6/132682585/jevagiwi.pdfIn PDF document text
    • http://moluteg.southerngrowers.com/uploads/1/3/1/8/131857920/segibanajivub-vifodula-vafovap-dulilulumamexi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1415/1589/files/tezaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tevedizulav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/mebabisukanajonizexasek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4467/4455/files/vugezulibevuputeketoraxut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3966/1986/files/3837417268.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6367/0939/files/economic_environment_of_business_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8790/4411/files/97014624948.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/attendance_sheet_ms_word.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2955/3575/files/90711922765.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4133/9045/files/winrar_64_free_windows_10.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_off00008706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8706 4916 bytes
SHA-256: 0495ad836030279e15d57c0a436b8ab973640bd54ff616b59da158fb306fc641
font_01_sfnt_off000097b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97B2 11036 bytes
SHA-256: b019a9630f3cf9b1531d707255feeae4ad6759f088821e5e0781803feb853bae
font_02_sfnt_off0000bd07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD07 19396 bytes
SHA-256: de360b01d11f70e407e0a000346bc491876559628adae1e2a6d3ac89abd2e892
font_03_sfnt_off0000dbeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEB 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333