Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e2139b28620fe8…

MALICIOUS

PDF

46.0 KB Created: 2020-08-11 16:36:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 153945de400b39d85ef374c0d5a02f57 SHA-1: 9a1f422c9190b6a81f07497cfa587147db1cb9e1 SHA-256: 54e2139b28620fe82c3437d932e15940e8c9efae1685e0fc05825cf89d84caaf
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to 'adjective adverb worksheets pdf'. The ML classifier strongly indicated maliciousness. The primary attack pattern involves redirecting users to malicious infrastructure via embedded links.

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=adjective+adverb+worksheets+pdf In PDF document text
    • http://dadamikas.karmenkooyers.com/uploads/1/3/1/1/131164250/654785.pdfIn PDF document text
    • http://files.c4leaders.org/uploads/1/3/0/7/130740257/wubonesawikepazis.pdfIn PDF document text
    • http://bovejitax.uluwatustudio.com/uploads/1/3/1/4/131408738/mobugoni-kivemonevak-gogodinofet.pdfIn PDF document text
    • http://files.texaslonestarrug.com/uploads/1/3/0/8/130814769/1821653.pdfIn PDF document text
    • http://votavex.aeromechanism.com/uploads/1/3/0/9/130969352/vutezakozilumo_kusibubi.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/1/0439/7219/8558/files/wuxiwafilewojujilemuxupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7081/5397/files/24763306521.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1596/8667/files/62174321185.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1645/2258/files/jibijamezipixulabenom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0243/6518/files/biology_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6174/7605/files/42190880930.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/tesimovorosexututevifaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8115/2152/files/80473666503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7609/1032/files/6617003635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9577/7699/files/sevalejisapagumuso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5881/3333/files/27832156318.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0800/7072/files/wujererigutakodiwiz.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 5

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_off00007529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7529 5632 bytes
SHA-256: 081048d34b2f0d4ef2ddb8716689618896943f46768af0a92c44cadcd701574c
font_01_sfnt_off0000885b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x885B 10064 bytes
SHA-256: 66762c8a1804571903ebc31c9f4e8614bfca9e1550aac1dbc21a4e8620396319

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