Malicious PDF — malware analysis report

Static analysis result for SHA-256 12101e20f09b29f0…

MALICIOUS

PDF

39.0 KB Created: 2020-07-30 20:05:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5258c7e157eefe71caa1c1a737b4d5c0 SHA-1: 166113198b9b66bea04c8ab64b69cf6e65056775 SHA-256: 12101e20f09b29f096d88eec01366ccce369c3ccd53d0e7d43225080a94c803d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious redirection and a link farm, pointing to known malicious redirector infrastructure. The embedded URLs and the document body suggest a lure related to a 'postnatal depression questionnaire' to entice users to click on malicious links. While no scripts were extracted, the PDF structure and linked URLs strongly indicate a phishing or malware distribution 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.com/pify?keyword=postnatal+depression+questionnaire+pdf In PDF document text
    • http://files.jenniferroseheath.com/uploads/1/3/0/7/130739883/rudunozewi.pdfIn PDF document text
    • http://files.salittlescholarstutoring.com/uploads/1/3/1/6/131606260/felevavefukub.pdfIn PDF document text
    • http://files.heritagegb.org/uploads/1/3/1/4/131483029/putivitujuwe-tazifutuzogid-lupuvaxeme.pdfIn PDF document text
    • http://files.publichealthmuseum.org/uploads/1/3/1/4/131483128/3817572.pdfIn PDF document text
    • http://files.tosharollins.com/uploads/1/3/1/6/131607232/jodoxajupada-popeb-sujedoz.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/1/0440/1886/0190/files/kametupoban.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5623/3638/files/97320135820.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/95541939045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5496/4631/files/nivufumabunujemuxigetapa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7469/8902/files/95722430682.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3343/5029/files/maliv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/87504674409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9358/9142/files/nakalir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/tuwes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1516/6357/files/nalubizapozigedemanave.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/4263687573.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/jasakepeba.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 8

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_off00005c41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C41 5044 bytes
SHA-256: b9397ede6a02112c4788c1dfdabb4879a61489d4a91a944154eee40e4e519f23
font_01_sfnt_off00006d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D65 9856 bytes
SHA-256: d69417a2c4b63f09cf10414d75dbf4f5d7367ce65fa54ac566f417048681c196

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