Malicious PDF — malware analysis report

Static analysis result for SHA-256 d38d51f9921ca4b4…

MALICIOUS

PDF

48.3 KB Created: 2020-08-17 14:39:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a6fe45004c459dd2c5dcf00a8cc34e5f SHA-1: 58ce556b36eca0931cc77e2ddfb670f383d18a59 SHA-256: d38d51f9921ca4b4c3a4013e9f391ac16038e318474bdd2869213d130932ad57
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=el+alienista+pdf+gratis'. Additionally, it exhibits a PDF link farm behavior, embedding numerous external links, many of which host PDF files. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to a malicious site under the guise of providing a free PDF.

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=el+alienista+pdf+gratis In PDF document text
    • http://files.eyelashogden.com/uploads/1/3/2/3/132303138/5374281.pdfIn PDF document text
    • http://matuxe.tranquilmomentsskincare.com/uploads/1/3/1/4/131406427/c935ab745757b2.pdfIn PDF document text
    • http://sirujese.tamra-davis.com/uploads/1/3/1/6/131637395/lonavekap.pdfIn PDF document text
    • http://bexiw.shellystill.co.uk/uploads/1/3/1/8/131871899/jetowogatama_memetepikiwesag_vutebuxudet.pdfIn PDF document text
    • http://files.gamedaytraining.net/uploads/1/3/2/8/132815063/nuwewim.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/1/0430/7301/1863/files/ilocano_orthography.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7110/3395/files/93198925705.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7547/7416/files/xawezozawuxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9231/8110/files/83983570353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3988/1376/files/quimica_inorganica_concepto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0008/4126/files/important_full_forms_of_science.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2597/2904/files/javascript_anonymous_function.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6871/0309/files/xuwipi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7239 4844 bytes
SHA-256: 92177f7f54de93af3653c608eec12b888a0bc0dbbc1462697e971788b5dc0518
font_01_sfnt_off000082b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82B6 10944 bytes
SHA-256: 2f129543fc9727c831f3154315397ec50d5e433351fb58f1167dfc97c5eda940
font_02_sfnt_off0000a6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6A2 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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