Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef1bbf0839d0d014…

MALICIOUS

PDF

43.0 KB Created: 2020-07-31 22:09:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4aa4a45b853118b9014d09486ce2f16f SHA-1: 3e2dec8b62b880350d2a9bdca873a770e6d1f405 SHA-256: ef1bbf0839d0d014c2cba2ea69e92f46b60bcb4cc37e245ebe86c39bfc1ceb18
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. This suggests a phishing or scam attempt, where users are enticed to click links that lead to malicious websites. The presence of a malicious redirector at https://ttraff.com/pify?keyword=lasso+in+r is a high-priority indicator.

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=lasso+in+r In PDF document text
    • http://files.vetrehabcenter.com/uploads/1/3/0/8/130813799/63e58b1825841.pdfIn PDF document text
    • http://files.lemoyne.org/uploads/1/3/1/4/131454207/xudixasidata-bezek-dewerabanebo.pdfIn PDF document text
    • http://files.auce.org/uploads/1/3/1/4/131407423/8302501.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/1/0431/5080/3099/files/vupedapofuvagenepedaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/32914748004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9618/7815/files/domibipukegaton.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4618/1787/files/zinezodewagimiturib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wulusiwebope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6532/7262/files/82128406633.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9714/2936/files/32291488564.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9816/8725/files/91204487955.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2216/1832/files/bovore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7456/7843/files/woleg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0421/4942/files/folezovadelige.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 2

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5E 4176 bytes
SHA-256: d0886734c212f26bd1c89ea7757585b2ba4425a48b2ffbf68d6b388cd10593f5
font_01_sfnt_off00006c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6F 10884 bytes
SHA-256: d9a7ac13342ebfc37bdd030636cb0f00efc885cd00f38f4cf20916dcc2a0ab1e
font_02_sfnt_off00009198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9198 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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