Malicious PDF — malware analysis report

Static analysis result for SHA-256 91d838cf3cf58c82…

MALICIOUS

PDF

58.2 KB Created: 2020-08-18 16:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d1b5b3122f908b5ef8c4df083d0cada9 SHA-1: f40a4a1bfb21fa0b051d7918e0e0c4417056c4d7 SHA-256: 91d838cf3cf58c82462074d377d05c6c5d5b87cf2667ccdff291c2f167cfc3c8
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting an attempt to drive traffic to malicious infrastructure. The embedded URL 'https://ttraff.ru/pify?keyword=naruto+shippuden+opening+song+blue+bird' is identified as a malicious redirector. While no scripts were extracted, the PDF structure and linked URLs strongly suggest a phishing or scam attempt.

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=naruto+shippuden+opening+song+blue+bird In PDF document text
    • http://files.fshsalumni.org/uploads/1/3/1/3/131378897/a5055413aae8.pdfIn PDF document text
    • http://files.paisleypelladalmatians.com/uploads/1/3/1/1/131163634/8990810.pdfIn PDF document text
    • http://files.katiewoodsdesign.com/uploads/1/3/0/8/130874627/dajirubetifafisexep.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/1/0429/8306/3715/files/435680430.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8643/8807/files/high_school_science_report_comments.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1814/1347/files/aquatic_ecosystems_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8032/6051/files/woxigirero.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7868051279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0886/0065/files/automata_theory_and_computability_by_padma_reddy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5804/4828/files/88794571154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8674/8579/files/14116127354.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9245/7112/files/hyundai_elantra_2017_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6738/3713/files/ielts_academic_reading_practice_test_3_with_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000608c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x608C 18744 bytes
SHA-256: 554bd79995cc92504ec2e82aa0da63ca47a02d41fcef05db915904d112d02d94
font_01_sfnt_off00009bd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BD9 5328 bytes
SHA-256: 1f24a6fd98aecdb8fcc0b9ad4da3c4c66a80e9ea770163e13a5abdcb4f46c6a7
font_02_sfnt_off0000ade9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADE9 14864 bytes
SHA-256: df414a2e634dcb0c78ce5b534e48bf766b2c499c95815cd37ce7e3e2f9364b8b

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