Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fc715b51386d375…

MALICIOUS

PDF

47.1 KB Created: 2020-08-14 10:13:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5fb91f01503aa5572fdd154044cd639d SHA-1: 37595298498e178875d1e8dd05eaf7d5c441f720 SHA-256: 8fc715b51386d375f77b20498736108252aee4fe64569f6672c9dc6d37e8a933
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'online reservation system thesis documentation pdf', suggesting a lure. The presence of a link farm heuristic further indicates malicious intent to drive traffic to external sites.

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/wb?keyword=online%20reservation%20system%20thesis%20documentation%20pdf In PDF document text
    • http://files.bluebeatsmentalhealth.com/uploads/1/3/0/8/130874613/nisasegadorigepa.pdfIn PDF document text
    • http://files.brianyoungphotos.com/uploads/1/3/1/6/131636819/fagasi_nafovo_fafifekiton.pdfIn PDF document text
    • http://files.simply-scripted.com/uploads/1/3/0/7/130775228/4064420.pdfIn PDF document text
    • http://files.rgordonbuilt.com/uploads/1/3/1/4/131455463/legitis.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/1/0429/7064/4631/files/93245148384.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0356/7515/files/33315282574.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/60708009425.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7545/2569/files/47825188850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/2622851625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47184882359.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3295/1446/files/biceps_tendonitis_patient_handout.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2692/3172/files/ludonuden.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gamusuzojikifikukudubug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2202/4867/files/mefajozovepefup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/14044754227.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 5

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_off00007419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7419 5584 bytes
SHA-256: 84308fcaac0b417a54a66dd871b4fe1c2e82cade6de1523e5d528a8dda5094bb
font_01_sfnt_off000086f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86F4 12468 bytes
SHA-256: 59943ca4e82624701e8b0b29d633909f2c01ffeda42af52005a528cb197f431d

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