Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a6e9fda6b6578be…

MALICIOUS

PDF

42.6 KB Created: 2020-08-10 03:51:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fe83187442e249beabf805ae4159fe1c SHA-1: 13fb698b2c78be2e52d83e5ebaf39bc57505a6aa SHA-256: 5a6e9fda6b6578be164efa7ae200bc50cdf4c00ba635aeb47dcf6f6dc41997ad
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that aligns with the malicious redirector. This suggests the primary purpose is to redirect users to malicious sites, likely for phishing or malware 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.com/pify?keyword=pdf+test+file+size In PDF document text
    • http://tupopa.browndogbiking.com/uploads/1/3/2/7/132740435/vubipopawajifo.pdfIn PDF document text
    • http://files.nursinghomepj.com/uploads/1/3/0/7/130776296/vadifadi-bezefugabepamu-lorasoridosom-lizejarunofal.pdfIn PDF document text
    • http://files.jennygodley.com/uploads/1/3/1/4/131408942/722584.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/1/0435/1967/2472/files/87575439446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5267/9836/files/positive_n_words.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1131/5611/files/bsc_magazine_jan_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4314/4355/files/xipobitevegenurifa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5245/7369/files/r_integer_0.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/7025/5267/files/macroeconomics_5th_edition_williamson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/viwukodezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/77047833196.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0645/1094/files/ielts_synonyms_for_words_commonly_used.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56070096689.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 7

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_off00006c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C31 4644 bytes
SHA-256: 716230fe810c5aee53f71f924f073f41871fcc6cf52d24d51950faa66b1c6d1a
font_01_sfnt_off00007c21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C21 9968 bytes
SHA-256: a0264a7e7f98da43912f95478b927c0559b0b575173eb33d6bf037c8c3b4e4a1

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