Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcbcf9b10867fb20…

MALICIOUS

PDF

54.7 KB Created: 2020-07-19 07:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dc4e58261d6cdabfa659e69c15c4df07 SHA-1: 758e0fc0dec82abbe171a6b6778281a9c6a6aa92 SHA-256: dcbcf9b10867fb20e529928fd80a1068502f05fae9093f0e73d4d57ec67a2ad6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a significant number of embedded external links, with at least one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack pattern observed is the use of a link farm within the PDF to direct users to potentially harmful content, likely for phishing or malware delivery.

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=hierarchy+of+norms+pdf In PDF document text
    • http://files.alphlukaupartners.com/uploads/1/3/0/7/130740589/86d5e2071a80.pdfIn PDF document text
    • http://files.cathyleavittcreations.com/uploads/1/3/0/7/130776875/6f40ac.pdfIn PDF document text
    • http://files.turkeycreekretrievers.com/uploads/1/3/0/8/130814706/1707816.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/1/0428/4815/7859/files/38709882352.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wanojexabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8414/5049/files/88382950373.pdfIn PDF document text
    • https://saguwer.files.wordpress.com/2020/06/52708618160.pdfIn PDF document text
    • https://puvunitulev448898520.files.wordpress.com/2020/06/repunojivepaxojavo.pdfIn PDF document text
    • https://pawawezutib.files.wordpress.com/2020/07/mowewiferabi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vibemegabixowosepabotabux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7997/5590/files/3321230287.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1965/7628/files/kinobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3467/3301/files/72631041088.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9004/3287/files/posote.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9162/4096/files/34460001723.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4061/3286/files/27235781058.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8731/4590/files/fuzabigalano.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 8

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_off00009946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9946 5132 bytes
SHA-256: e730f3e6ff45f5f910130b430ec7252a9b87621a6a54cc374a06088571a02536
font_01_sfnt_off0000aa83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA83 10196 bytes
SHA-256: 04670c618ed6b61e6a78cc199878ed4291b58756854c274a5d7cc460a18dc7a4

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