Malicious PDF — malware analysis report

Static analysis result for SHA-256 a38e769f8ced39ab…

MALICIOUS

PDF

41.0 KB Created: 2020-08-28 09:44:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8a0693946a5378ff6f703df7d0d140e9 SHA-1: 3135e2409c2d8d6671d44a05dde04796b4978cdf SHA-256: a38e769f8ced39ab72e99b8340bc1e355b2af4314aea629a357aa8d12de0d9db
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=libro+el+caballero+dela+armadura+oxidada', which is likely intended to lead the user to malicious content. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, suggesting an attempt to obscure the true malicious destination or engage in SEO manipulation for malicious purposes.

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=libro+el+caballero+dela+armadura+oxidada In PDF document text
    • http://files.sciencelife.org/uploads/1/3/1/0/131071209/favubu.pdfIn PDF document text
    • http://files.teamhighlightreel.com/uploads/1/3/1/4/131453256/jakuso_pivetid_leritasataxi_zedorefalikos.pdfIn PDF document text
    • http://files.msjonline.com.au/uploads/1/3/1/3/131381518/betusosazadij_mokilolepaja_karekop_vaxab.pdfIn PDF document text
    • http://ledifaro.simplycreativetreasures.com/uploads/1/3/1/6/131606271/25a91937a.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/1/0437/7129/7943/files/37087190347.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5293/3019/files/buxupixakovezonura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5725/0455/files/91534054554.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8948/4190/files/hardwick_vt_police_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7440/5023/files/pexurenenenawuvalusunup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0866/2440/files/fosuxanomepoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5897/8207/files/92484895269.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9969/9866/files/37921577672.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1123/4197/files/lelaridalarinuxutij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9272/9246/files/street_fighter_for_nintendo_64.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5652/8537/files/90863640390.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_off00005f19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F19 5056 bytes
SHA-256: bf203f1c435e3bbdcff42dd844d136989fce0c0430355557f5bf966ebddb7b92
font_01_sfnt_off00007027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7027 11352 bytes
SHA-256: 8afdf9f444e6cc3c3db74f77cbd4976483c4ff9a3f376faab0160ad4de3f142e

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