Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada667784459d54f…

MALICIOUS

PDF

42.4 KB Created: 2020-08-07 04:42:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1cd5bbd7e6f04540b57d002a9db9f49a SHA-1: ebf584370911f2611a5358efbdd75701a3c1eec7 SHA-256: ada667784459d54f36eac87ab94606bf094a8dd75f34858b31f5561418657bb2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated and appears to contain a URL that is likely used to redirect users to malicious content. The presence of numerous links suggests a link farm or phishing attempt.

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=berchemia+zeyheri+pdf In PDF document text
    • http://files.rebuildhopekansas.org/uploads/1/3/1/6/131637125/6682295.pdfIn PDF document text
    • http://files.aaronhosannah.com/uploads/1/3/1/4/131454151/xefer.pdfIn PDF document text
    • http://files.professortruszkowski.org/uploads/1/3/0/7/130775135/7331505.pdfIn PDF document text
    • http://jedonize.chapstickdiaries.com/uploads/1/3/0/8/130814411/rapenutakemip-dutotilivazuzu-nejok-dodov.pdfIn PDF document text
    • http://mosuriz.therefugephilomath.org/uploads/1/3/0/7/130776485/rejuwawebujub.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/1/0437/7778/6018/files/nivujonuvefusakidunuju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4169/7441/files/chemistry_notes_class_12.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/gidoxabojumukusevapiwoxim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0658/3203/files/93978689427.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4145/5261/files/wiwewesoxefijiri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/nizakawatus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5012/3943/files/begujewefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0496/0676/files/13818374709.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/1626/0517/files/general_ledger_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6839/9524/files/81251601244.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6769/5511/files/celula_eucariotica_e_procariotica.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_off000066be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66BE 5388 bytes
SHA-256: 8e9a8940bfe1855a3ed3eb65d9dde3ec131973c2c601eeedbc682fe809805cf1
font_01_sfnt_off000078fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78FC 10356 bytes
SHA-256: 6eef62ab2236f33136ca243088ea66b56b210c61fe5ea4a03303b157d27cf0c3

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