Malicious PDF — malware analysis report

Static analysis result for SHA-256 794400ca70ae2aa1…

MALICIOUS

PDF

44.0 KB Created: 2020-08-15 12:38:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0956125d649a2a784bf2b2458138f161 SHA-1: 7340eef8c85f1a13865fbdba624e9584a6943444 SHA-256: 794400ca70ae2aa1127c03c8b7d6e7b5b03761899acd7eaa60af78be665ecb59
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, masquerading as a vocabulary worksheet creator, that redirect to a malicious URL. The ML classifier strongly indicated maliciousness, and heuristics identified it as a redirector and a link farm, suggesting a phishing or scam attempt. The primary malicious IOC is the redirector URL used in the lure.

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.cc/pify?keyword=vocabulary+worksheet+creator In PDF document text
    • http://xowudifes.adaptivedrivingexperience.org/uploads/1/3/1/3/131383541/3868f75fe7341e.pdfIn PDF document text
    • http://zizif.mindfulohio.com/uploads/1/3/0/7/130775505/95270c9583f0a.pdfIn PDF document text
    • http://files.garrafraunsns.com/uploads/1/3/1/8/131871677/61d99e616122b5.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/1/0434/0137/9996/files/brs_biochemistry_molecular_biology_and_genetics_6th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4245/5207/files/juvugaseximere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5864/1573/files/67450126924.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8081/8581/files/veborep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6560/6301/files/shifty_eyes_emoticon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4742/6975/files/38328252275.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3722/8188/files/vocabulary_words_with_sentences.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1400/2600/files/injustice_gods_among_us_pc_mods.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9209/8726/files/kavozufatatofomurokuxid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2925/6613/files/87835276110.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D53 5252 bytes
SHA-256: d3eadea41e19cf84dd4f4f9c67a4f1deb8b5766b45b9beb67b3892750c1ad1d3
font_01_sfnt_off00007f36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F36 10596 bytes
SHA-256: bc491fc311f79e937d08b578dc84788056ddca125131ab6e3ea33d0df5dd8829

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