Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe639e35fc613ec3…

MALICIOUS

PDF

34.3 KB Created: 2020-08-10 07:21:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ee472793c061a978f86e61c775844b2a SHA-1: 1eed5aa286d0cdeb089668860cf17d5c0ebb8425 SHA-256: fe639e35fc613ec311424107c3dfbcfd6fec376850c70dbd0af26e1bc7749589
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The document body text, though partially corrupted, includes a lure related to 'Nuance power pdf' validation, suggesting a phishing attempt. The presence of a large number of embedded links, many pointing to Shopify domains, indicates a link farm designed to obscure the malicious redirector.

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=nuance+power+pdf+at+least+one+signature+requires+validating In PDF document text
    • http://files.ivansivak.net/uploads/1/3/2/6/132695280/8852f08.pdfIn PDF document text
    • http://files.aleonor1to1.com/uploads/1/3/1/0/131069812/5239366.pdfIn PDF document text
    • http://files.jmenterprisesllc.net/uploads/1/3/0/7/130739718/3756183.pdfIn PDF document text
    • http://files.lutesfamilyart.com/uploads/1/3/1/4/131411596/safosutarog.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/1/0428/9105/1161/files/aircraft_performance_and_design_anderson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3929/3589/files/turetotode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/5042/9598/files/cbc_blood_test_normal_values_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8272/7067/files/20009994926.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/buddhist_philosophy_essential_readings.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9843/9837/files/mobil_oil_filter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1031/6694/files/adulteration_of_milk_products.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8697/1029/files/definicion_de_estrategias_de_enseanza_aprendizaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6596/6754/files/10275374169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/46972488611.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0494/4807/files/65153232106.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_off000046eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46EB 5572 bytes
SHA-256: 53c976475b168d230b0aa301853d09c33c12f0d0c847c3d98679555bf770365c
font_01_sfnt_off00005a01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A01 9936 bytes
SHA-256: 4ae311f8b0f9ee09db44e9f53338eb229b563bd34801afe64716ed1ed013c55d

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