Malicious PDF — malware analysis report

Static analysis result for SHA-256 de7b461553328cde…

MALICIOUS

PDF

51.8 KB Created: 2020-07-28 16:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 518903544ec8e6b0157d93199b87c990 SHA-1: 15e1f6572a5c0d810ef410b66dee941caabc7244 SHA-256: de7b461553328cde83fd6b5167fceeafa25639bcfb331ee3f25b53e0c5464622
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a PDF link farm. One of the primary links points to a known malicious redirector, while others lead to a large collection of PDFs hosted on Shopify. The document body is heavily obfuscated and appears to be largely junk data, but the presence of the 'wkhtmltopdf' string suggests it was generated programmatically. The overall pattern suggests an attempt to leverage SEO or redirect users to malicious content.

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.cc/pify?keyword=mandolin+headstock+template In PDF document text
    • http://files.evelynwalters.com/uploads/1/3/1/4/131454496/92686.pdfIn PDF document text
    • http://files.envirolawteachers.com/uploads/1/3/1/4/131437683/datudinezodawe-vuren-gifogi.pdfIn PDF document text
    • http://files.educationalroboticsreview.com/uploads/1/3/0/8/130873769/rifix-voveluxireveziz.pdfIn PDF document text
    • http://files.brianknightresearch.com/uploads/1/3/0/9/130969809/1a6420a.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/1/0433/0687/7080/files/85155057715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/zidumusumopebino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7679/6057/files/kigonulumekobudapiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5025/1941/files/jedezufita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9395/8560/files/jukububokem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/65635097388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5018/9478/files/92646459271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0634/5895/files/92694211269.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/75530014000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/fusufutakaraxexuruzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7474/0639/files/wonorebax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2195/1391/files/fubojoresego.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baxumedufimoval.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008d1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D1C 5072 bytes
SHA-256: 1ef2d33584a7b7f0fe65bd08a56b6ce37a90d2aacd843aeed4dbdd575dcfc387
font_01_sfnt_off00009e30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E30 10604 bytes
SHA-256: d751de35392042683fcbc7aa38e39897752d6c1c2123a1c6cd149e3a392a7da6

Open this report in the interactive analyzer, or submit your own file for analysis.