Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dfc7f8e8f0a7d2f…

MALICIOUS

PDF

41.8 KB Created: 2020-08-16 21:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 870e8eb940db431347dbf402eda437b4 SHA-1: a0bed3c46e67c4443fe444ccb7b0da950b2b0d6e SHA-256: 8dfc7f8e8f0a7d2f278f3dfc9483e35246d8b44c437b0bccc88ab61698046d82
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a link farm. One of the primary links, 'https://ttraff.cc/pify?keyword=sample+format+of+appreciation+certificate', is identified as a malicious redirector. This suggests the document is designed to lead users to malicious websites under the guise of providing a certificate format. The presence of numerous links, including those on Shopify domains, indicates an attempt to obscure the malicious destination and potentially leverage SEO techniques for distribution.

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=sample+format+of+appreciation+certificate In PDF document text
    • http://files.earthboundgardens.com/uploads/1/3/2/3/132303077/begifadexisaginafaxe.pdfIn PDF document text
    • http://dapetamiw.flyingleadsaddleclub.com/uploads/1/3/1/4/131437208/vipojapigoru.pdfIn PDF document text
    • http://files.jpsact.org/uploads/1/3/2/3/132303028/e61e59.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/1/0437/4154/4600/files/academic_writing_course_syllabus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7001/9998/files/bovobujop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9079/5941/files/97457017581.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3976/0285/files/pajutiduwojibenemavisava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/subosobipipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/linea_base_ambiental_de_un_proyecto_minero.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/befuxaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94608223162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3514/7933/files/electrical_engineering_basics.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 4

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_off00005afc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AFC 4872 bytes
SHA-256: d472febde26ec5663613ad4b5241a1796a4c9374bb94a731eb08df5a6e2dfccb
font_01_sfnt_off00006b64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B64 9716 bytes
SHA-256: 4035f67891de7274e915497401648aa96fefae96db62fe7d68b61901369580f6
font_02_sfnt_off00008c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C31 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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