Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8a5a8d69fb503c7…

MALICIOUS

PDF

35.8 KB Created: 2020-08-09 00:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2e291ea8d6709f03b87918626d54556f SHA-1: 9287bdf50fb5dfbe39f69df454ba52caf7cded5a SHA-256: f8a5a8d69fb503c7088c7f65f9905007eb1a47129148fc5dbaa69a3c578bfab4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic identifying a redirector to a known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that matches the one identified by the heuristic, suggesting a phishing or scam attempt. The presence of numerous links to external PDFs, many hosted on Shopify, indicates a link farm designed to attract traffic.

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=corazon+de+ni%25C3%25B1o+richard+clayderman+pdf In PDF document text
    • http://ragaxa.connectionsgifu.com/uploads/1/3/2/6/132682076/8930304.pdfIn PDF document text
    • http://baxiv.thewirld.org/uploads/1/3/1/1/131164250/1939317.pdfIn PDF document text
    • http://files.laceytezino.com/uploads/1/3/1/4/131437619/9235d33df23.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/1/0433/0687/7080/files/84602765162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/fexamidinobulud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9938/1157/files/bamirapunozora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5852/8405/files/rimunovulagedize.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0771/2155/files/taxezojafa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6962/7799/files/canon_5d_mk_iii_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/fcat_scores_2015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5448/1058/files/98952675721.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9937/4233/files/apriori_algorithm_implementation_in_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/578192900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9197/4557/files/mufexuxuweb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9612/1248/files/capacitive_humidity_sensor.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 2

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_off00004b10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B10 5484 bytes
SHA-256: 9e037ad3d3fdc305856f3ded78f97134a9ac7fc7694145beb2d1b161e6e39a0b
font_01_sfnt_off00005d5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D5B 10176 bytes
SHA-256: e1a4aa0e20b26d9c4c17f2288846337ca375c74c5232c89189ab93dbe2e1ef64

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