Malicious PDF — malware analysis report

Static analysis result for SHA-256 8538b7bd9441f0ab…

MALICIOUS

PDF

40.0 KB Created: 2020-08-26 08:09:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3ef39fd2eb4b352aec9503f90e4135e3 SHA-1: 8d966b0f52ca4ba7c8e2bd83780735433a40043c SHA-256: 8538b7bd9441f0abdcfef7cee6fb653667c7c5fe656bbc4fe211356aa6edf0a9
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though partially corrupted, contains the URL 'https://ttraff.cc/pify?keyword=on-line+henry+retrato+de+um+rel%25C3%25B3gio', which is also flagged as a malicious redirector. The presence of numerous PDF links suggests an attempt to create a link farm or distribute further malicious 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=on-line+henry+retrato+de+um+rel%25C3%25B3gio In PDF document text
    • http://files.ventowinds.org/uploads/1/3/1/4/131454126/2856845.pdfIn PDF document text
    • http://files.dustinwills.com/uploads/1/3/0/7/130740138/6426330.pdfIn PDF document text
    • http://files.megabiteschocolate.com/uploads/1/3/1/4/131438274/kuvajut.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/1/0434/1320/9246/files/xewumip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/somogugofekuvebiniraja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/86549454682.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5158/1591/files/8th_grade_math_lesson_plans.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8917/4432/files/76270999406.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1110/5191/files/agenda_2020_au.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/44329673845.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9365/9543/files/lisuluwapikewekevumawipus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1512/7708/files/new_born_baby_names_in_marathi_with_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/6595/1652/files/89174136093.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/jegupar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8606/1463/files/bjt_applications.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1594/3845/files/disaster_report_4_plus_summer_memories_switch.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 3

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_off00005cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CBF 5360 bytes
SHA-256: 90d2ad215a8c8bae1b76d32bbac15a78879ee86032183294a13eb387e69ac750
font_01_sfnt_off00006e96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E96 10108 bytes
SHA-256: 82d92695da1bc963d1008d1292ac34eaab7f2e61f27e8d290b1374a792d408fb

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