Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f94027b2f05ca5e…

MALICIOUS

PDF

37.6 KB Created: 2020-08-01 13:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 59caeb1e5b100d8b982dc0da3a8eb5d7 SHA-1: e4188537328add587125eaa820263d976a677261 SHA-256: 5f94027b2f05ca5e9928cd9646f316a963c7b96102d7584f218a8434443e364b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple embedded links, with a primary URL pointing to a known malicious redirector. Heuristics indicate this is part of an SEO link farm designed for phishing, likely attempting to trick users into downloading malicious content by posing as a free resource. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/pify?keyword=focus+on+grammar+5+4th+edition+pdf In PDF document text
    • http://files.sandrefotoagency.com/uploads/1/3/0/9/130969499/favurarenidupapeso.pdfIn PDF document text
    • http://files.pennyandpearlstudio.com/uploads/1/3/0/8/130873902/xozelitusudapot.pdfIn PDF document text
    • http://files.petersoncounseling.org/uploads/1/3/1/8/131858685/10079.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/1/0432/3858/8584/files/20644832158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3893/1109/files/84042481301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/kafezejomenalikuke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/21914700839.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6001/8852/files/pirojur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1129/0782/files/bilovetad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9299/2410/files/vitamulonurirakekatemis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52299098946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/15774365313.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5831/4912/files/rojufepadewo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6552/1814/files/wotigavexage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8473/2829/files/dozigi.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 4

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_off0000529a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x529A 5704 bytes
SHA-256: b4745dbf312bfd895f1ad47828cd0380921d3e035bac88b54c6b1d0b539ca013
font_01_sfnt_off000065e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E9 10164 bytes
SHA-256: 85fc595419870ec44c56489c8b70e1cf59b7c53ab76f9ad368302f9f2d94fd15

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