Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c6ef8da993103e1…

MALICIOUS

PDF

45.4 KB Created: 2020-07-30 02:13:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d4b6cc37e09a3f45f74cc4bd9b95561f SHA-1: 6071c996fab38c138ce1f96772649258570b7305 SHA-256: 0c6ef8da993103e1d059c14cc1fe99a12e3e6ea96a2c75b718df30e23a051ce4
194 Risk Score

Malware Insights

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

The PDF contains multiple links to redirector infrastructure, specifically 'ttraff.com', which is flagged as malicious. It also hosts a large number of external PDF links, many pointing to Shopify, suggesting an attempt to create a link farm for SEO purposes. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, indicating it was likely generated programmatically to appear as a legitimate download. The primary attack pattern involves luring users with the promise of free PDF content, which then redirects them to potentially harmful sites.

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=libros+de+antroposofia+pdf In PDF document text
    • http://files.trinitywellnesskc.com/uploads/1/3/1/8/131871740/015ce.pdfIn PDF document text
    • http://files.artistiquegym.com/uploads/1/3/0/7/130739449/siwimufof.pdfIn PDF document text
    • http://files.heritageschoolofdiscovery.com/uploads/1/3/0/7/130775145/9742970.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/1/0440/6811/0488/files/mafivuletofexopeta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3164/1762/files/73026488472.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9605/3662/files/18808767386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3982/4799/files/momufowizoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6056/0021/files/41244656702.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1826/3464/files/vogeso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kofuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1495/4908/files/gusinuwizufupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0872/1045/files/bevun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5210/3842/files/88920597102.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1097/4111/files/kiwufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/vigin.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 8

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_off00006fa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA7 4872 bytes
SHA-256: 3494e1f6fdf5cd1fb788a3eec1485f8a65a2fee7ceaf23438bb32855e53ba090
font_01_sfnt_off0000802f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x802F 11972 bytes
SHA-256: bd7c654939ab2149dd90c3c006d8fbf499e03e17f55b0bc33442de852f6ecab3

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