Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f6a79faf49813b4…

MALICIOUS

PDF

44.6 KB Created: 2020-08-27 12:39:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8ef49ddde7a564c39cb575794b2879c4 SHA-1: c7873746adebfe138b3f281a446a1a3a7008910f SHA-256: 5f6a79faf49813b45f90696bb01feda0be5022af9fec4e34c261af8f0a6d9b4d
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, indicating an attempt to lead users to malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple external links suggests a phishing or malware distribution scheme. No scripts were extracted, but the overall structure points to a social engineering attack.

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=iglesia+de+dios+evangelio+completo In PDF document text
    • http://tiluwami.plateauvalleyanimalhospital.com/uploads/1/3/0/9/130969627/b893b.pdfIn PDF document text
    • http://files.spiritofnvc.co.uk/uploads/1/3/0/7/130776388/woteluvam.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/1/0428/5769/3347/files/38268385808.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5679/8627/files/63091499684.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6871/0300/files/82455818773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8914/9608/files/fefenobejilubap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9144/3364/files/aroma_rice_cooker_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/4531/8819/files/biosynthesis_of_digitoxin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9273/6155/files/muramapakigemikuwitapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/tirivovipitafibodoned.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5906/9599/files/rekomukilukukunarebu.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_off00007254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7254 5292 bytes
SHA-256: 9317a1fb9c41dd3bcf6215b43bf8907fe7f22f07df43874ecc89a1685e7248ac
font_01_sfnt_off00008447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8447 10336 bytes
SHA-256: b53c709b35f83701982e86f0f75505217f34b538edb1fdd384db4d8826e31d1b

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