Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e327f7c93819d5…

MALICIOUS

PDF

55.0 KB Created: 2020-07-31 01:33:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cebcb26c873963600124c62c1bb7c754 SHA-1: 4f2756966931e8c112641b404fa0b89c102083be SHA-256: 12e327f7c93819d52a7d6f7973de623295ea5df1e366896149f86642eaab692f
194 Risk Score

Malware Insights

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

The sample is a PDF document that leverages a link farm and redirector to lure victims into downloading potentially malicious content, disguised as a technical book. The primary redirector URL is identified as malicious infrastructure. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to exploit user trust for malicious downloads.

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.com/pify?keyword=goodrich+tamassia+data+structures+and+algorithms+in+java+pdf In PDF document text
    • http://files.rexforddrive.com/uploads/1/3/0/8/130873965/13eddb8f9590e5.pdfIn PDF document text
    • http://files.atlantikwall-museum.nl/uploads/1/3/0/8/130873921/bavofunopaza.pdfIn PDF document text
    • http://files.wannabenomad.com/uploads/1/3/1/6/131606546/9856145.pdfIn PDF document text
    • http://files.nethertonmontessori.com/uploads/1/3/1/3/131384663/mivizimimanawo.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/1/0433/0127/3758/files/71999083138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5937/2439/files/20662697952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3861/3415/files/budewudaxolid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8527/4024/files/togikage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6041/9989/files/81413896510.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4527/3248/files/makob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0862/1735/files/84807166815.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0624/5539/files/60581235752.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/gitewukef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6280/2070/files/wazadelagukujixuxilelevot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8958/3514/files/beman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54748680829.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3654/0069/files/13940123217.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5618/5000/files/20197549266.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000082c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82C1 5620 bytes
SHA-256: 5c720dc19137936104b5eb5c970177942ef6587af391c63fabcf75f0a815e704
font_01_sfnt_off000095cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95CD 10144 bytes
SHA-256: a348e4439a66259a3b52201ac1ae0620ea657b79acf361337485bcd25c7181da
font_02_sfnt_off0000b876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB876 16084 bytes
SHA-256: 9c0b324cb00f432843e7bf6aa6681d4ee1950797a85fd697fe0bc8b121e8710a