Malicious PDF — malware analysis report

Static analysis result for SHA-256 39ffda1f3bafbdf7…

MALICIOUS

PDF

47.6 KB Created: 2020-08-02 18:12:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4546b5c15ab2db0628520b300eea5fb1 SHA-1: 17a314d728d3eef49428f4403d16cb7ea22106b2 SHA-256: 39ffda1f3bafbdf7c4757ff31b911f33333b1fc3eb594ff60187d8f0e1880d67
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 for a PDF link farm. One of the primary links points to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'And so this is christmas lyrics' and the malicious URL, suggesting a lure or spamming technique. The presence of numerous Shopify-hosted PDF links, some of which are confirmed benign, alongside the malicious redirector, indicates a likely SEO-based link farm or spam campaign designed to distribute 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.com/pify?keyword=and+so+this+is+christmas+lyrics In PDF document text
    • http://files.sonialopezcoaching.com/uploads/1/3/1/6/131606782/vuxase.pdfIn PDF document text
    • http://files.ironbreedlemc.org/uploads/1/3/0/9/130969389/341c1c3591.pdfIn PDF document text
    • http://files.missmurphyscience.com/uploads/1/3/1/6/131637055/lukov-xivawaxevem-zulabiduvuruj-gukusopajari.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/1/0435/5581/5583/files/dinemutazumunetos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7842/6534/files/operating_systems_concepts_9th_edition_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5772/6118/files/bupemu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/diniladimazaraxosi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6662/2105/files/10586674440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0922/0501/files/99084023743.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/78591386603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9765/3397/files/71971885553.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/43634721443.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5135/1207/files/71189425506.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1577/4108/files/92073886316.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30072581460.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_off00007c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C29 5268 bytes
SHA-256: baca8afc431f80df3f67d83f8aaa8f6aa87ac70a264584ab86bd0a972350c9a5
font_01_sfnt_off00008def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DEF 10528 bytes
SHA-256: d53d2919847f03c0ec3aee798cacfdd3e44ebab9afef484c2f09986f0a4feb9f

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