Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdd1b5f357d6a7a3…

MALICIOUS

PDF

51.5 KB Created: 2020-08-14 16:26:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f0af7d409aa0dbdda344d285874917ad SHA-1: 9e4af5cd4b3a189add11d754944c3eadb7e22a3c SHA-256: bdd1b5f357d6a7a3790e71191f44f19e92caf12b1a0c8eac8143ccb2009f3481
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting a deliberate attempt to lure users to malicious infrastructure. The ML classifier strongly supports the malicious verdict.

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=barsaat+song+audio In PDF document text
    • http://files.serenielle.com/uploads/1/3/1/8/131856626/xizuludereniv.pdfIn PDF document text
    • http://files.daniellefontainekoslowsky.com/uploads/1/3/2/6/132680962/9632087.pdfIn PDF document text
    • http://files.napaneefamilyeyecare.ca/uploads/1/3/1/1/131164009/765437.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/1/0431/9484/3298/files/seluvakafapazudewisodad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0501/6226/files/20683891495.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5496/3617/files/free_christian_movies_for_mobile_phones.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6017/3717/files/astral_pvc_pipe_fittings_catalogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3651/6250/files/fokufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2846/1206/files/kavupukopigag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7478/9281/files/82054071805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2207/3508/files/nekupekejixevupudup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2218/6656/files/sunken_cathedral_debussy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2915/8295/files/4460502844.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8543/6830/files/absolute_and_relative_location_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7605/8274/files/23185203068.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5729/9099/files/electrocardiograma_derivaciones.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_off000081ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81FF 5008 bytes
SHA-256: 64dae29e1c82e8f1e2bc09c0304a141fd23df3e479f487f15db24ac8746d7894
font_01_sfnt_off00009313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9313 14324 bytes
SHA-256: 79c1527ebe4ef9c2ec3447b77a033ef062dc6ac66057f7b79d4c49a3a4e92f4f

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