Malicious PDF — malware analysis report

Static analysis result for SHA-256 90be4be845309f23…

MALICIOUS

PDF

42.7 KB Created: 2020-08-26 01:06:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bd5dd96f9aa5f5c3c7ed0274d3c9dda4 SHA-1: 34fdbd04013afed955b96f89963313542a0aa0dc SHA-256: 90be4be845309f23624921fb65063bd1d062a62e050efa9f98c557c124d74833
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm designed to appear as legitimate educational material, specifically a "cogat practice test" for kindergarten. This link redirects to malicious infrastructure at ttraff.ru, indicating a phishing or malware distribution attempt. The PDF structure and embedded links strongly suggest a malicious intent to redirect users to harmful 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.ru/pify?keyword=cogat+practice+test+%2528kindergarten+an In PDF document text
    • http://files.shineonpro.com/uploads/1/3/1/4/131438330/bizobejogozikuzem.pdfIn PDF document text
    • http://wamemugid.couleeregionfitness.com/uploads/1/3/2/6/132695384/rotenedixa.pdfIn PDF document text
    • http://nikener.takakohasegawa.net/uploads/1/3/0/7/130776738/popebigetit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4899/2930/files/hadoop_hive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/43394324698.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1444/5465/files/tame_impala_elephant_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6596/5718/files/direct_tax_amendments_for_ay_2020_19.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6244/2646/files/wazowaraxugavizipupoxagu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0903/2863/files/caller_id_block_calls_texts_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6405/7247/files/misulo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5585/7315/files/85562301625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6113/2962/files/93401656832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9629/4051/files/knewton_alta_answer_key.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C54 5160 bytes
SHA-256: d49122b2c212418be44d94b4e85e6b6b2fb0d165410e42059db15ce43200a742
font_01_sfnt_off00006dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFD 9956 bytes
SHA-256: 1e6da936f9d226d46e814d19b5c8e1b3799991549ac97cbba9a6fa701b96b6e8
font_02_sfnt_off00008fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FEE 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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