Malicious PDF — malware analysis report

Static analysis result for SHA-256 75c33c4ff6b9469d…

MALICIOUS

PDF

34.0 KB Created: 2020-08-28 12:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4174be5ead4db4e11467679f8e3f9bc7 SHA-1: 5c1c8abd5ad0900ba9f4e4b7aeac4a5855093bc7 SHA-256: 75c33c4ff6b9469d97d5ab682c260b77d517d5ae527bb02fad68abd67e3a5683
194 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to an SEO redirector, which in turn leads to other PDF files hosted on Shopify. This indicates a link farm designed to lure users with seemingly legitimate content like 'solucionario tema 1 recursos humanos mc graw hill'. The ML classifier strongly flagged this PDF as malicious, and the presence of redirector links confirms a malicious intent to distribute further 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.cc/pify?keyword=solucionario+tema+1+recursos+humanos+mc+graw+hill In PDF document text
    • http://files.pattycakecupcakery.com/uploads/1/3/0/8/130814644/bejetipamop.pdfIn PDF document text
    • http://runakaz.elizabethjunebergman.com/uploads/1/3/2/3/132303245/249889b2b1253f1.pdfIn PDF document text
    • http://files.rollinakersfarm.com/uploads/1/3/1/8/131871569/jipodanosipoxiw_ketifif.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/1/0429/8833/9354/files/59991731654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/figarawevig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1524/8794/files/auxiliary_verbs_worksheets_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9279/4774/files/47185167357.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/pojusudom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3355/1260/files/21444423115.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3102/0198/files/10595791633.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3657/1808/files/passive_voice_simple_past_tense.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5357/9430/files/58787010031.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3483/5094/files/rinisinozoto.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_off00004316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4316 5460 bytes
SHA-256: 1eaf403efb9b13a0b0da64d8ae83d53bf7ede712e40e84a71680cec5acc01ffa
font_01_sfnt_off00005588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5588 10792 bytes
SHA-256: 0aec635be9eede8417d8949ab450e4ac658998578fab0aaf80f0177bacd3a511

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