Malicious PDF — malware analysis report

Static analysis result for SHA-256 f674807e642f1519…

MALICIOUS

PDF

35.1 KB Created: 2020-08-13 15:41:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6a16d82c8465bc887f45154ffcdaa2ef SHA-1: 4cba82bcf5ce1a37c21a125ec2ebb783b34a8dda SHA-256: f674807e642f1519ded227edc345d829d43fb8f35bd940426d51c08174259f9d
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=bernardo+stamateas+libros+pdf+gratis'. The document body, though heavily obfuscated, also contains this URL and other links to Shopify domains, suggesting a link farm or redirection scheme. The intent appears to be to redirect the user to malicious content or phishing pages.

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=bernardo+stamateas+libros+pdf+gratis In PDF document text
    • http://nuwogo.michellewalkermusic.com/uploads/1/3/0/7/130775413/loxarizakewapiz-kexal.pdfIn PDF document text
    • http://files.maikenmsrd.com/uploads/1/3/1/8/131871864/sabenuwanuro-wokadimez-rotoxuzofere-jowaguvebekeg.pdfIn PDF document text
    • http://files.zoom-travels.com/uploads/1/3/0/7/130775432/726bad2e71787.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/1/0433/1359/4526/files/jubufizerominutufobiwowev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6980/8548/files/nuradovanotinidil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3343/4011/files/fisiologia_pancreas_exocrino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rikujolam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5820/8672/files/alexis_texas_massage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/nonolonabez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7879/4917/files/round_up_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/alcoholics_anonymous_big_book_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9758/7861/files/59671914492.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/mibunanezilesifan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4357/0343/files/86433981207.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/24209667617.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dusegu.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 1

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_off000046a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46A7 5552 bytes
SHA-256: 136897d435e29cf0c75b5c85d2e7c0f3cc30f97f32ddfee03e0c793449b5a0ad
font_01_sfnt_off00005969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5969 11184 bytes
SHA-256: 7208a5b828c16d665a635cb7ba4fca882925e4c6d843d4b9bdfa2074f59134cb

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