Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5dc9d5c6f198dc8…

MALICIOUS

PDF

42.1 KB Created: 2020-08-15 06:24:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e349712eb8c89387448451cd05447c86 SHA-1: 0c63fb25ed5a17b473b11afa8bea0f106fb0a244 SHA-256: d5dc9d5c6f198dc8b1a7e264f28a30d928f6bc5bad9274c1c034fd0bf9687af4
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 itself is heavily obfuscated but contains the same URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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=laporan%20pendahuluan%20tumor%20phyllodes%20pdf In PDF document text
    • http://files.centerforburmastudies.com/uploads/1/3/0/7/130775033/db3ee.pdfIn PDF document text
    • http://files.thesturdybranch.com/uploads/1/3/1/3/131383386/tojekajenizog-soburul-bisofevanobo.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/1/0434/5544/7202/files/21923058799.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/tumisapagigig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/1022831224.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3860/5461/files/65073717775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/spotlights_on_anesthesia_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9596/5352/files/pdf417_barcode_generator_software.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1146/5638/files/bunker_oil_convention.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0431/3247/files/pathophysiology_of_respiratory_acidosis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/suvalewun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5713/5257/files/lafagetizokofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7446/1589/files/vivaldi_gloria_in_d_major.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_off00006069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6069 5324 bytes
SHA-256: 90c5bf224b616484ab84e0d1a79a1b0852598fb1f860e101005d4db680414acb
font_01_sfnt_off0000725d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x725D 12656 bytes
SHA-256: 6c322d07e88f0effccdaab80142bac3f28ab2df2d4bef1bd67abb500f33b4243

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