Malicious PDF — malware analysis report

Static analysis result for SHA-256 27b24703e8cf7e3c…

MALICIOUS

PDF

33.4 KB Created: 2020-08-22 11:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c4d17350d2d32a0c85223d37161aa8e7 SHA-1: 8897795d68e27e6daaa9ffc2f21a22c10b4704ae SHA-256: 27b24703e8cf7e3c231998e4eb9fb9d690b5bd72e8ecda09a9dc4ac9d59c2b13
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 ML classifier strongly indicates maliciousness. The document appears to be a lure, presenting itself as a 'self certification form print' and embedding numerous links, many of which point to benign Shopify URLs, but one critical link redirects to `https://ttraff.cc/pify?keyword=self+certification+form+print`, a known malicious redirector. This suggests the primary goal is to redirect the user to malicious content.

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=self+certification+form+print In PDF document text
    • http://files.ian-b-robertson.com/uploads/1/3/1/1/131164130/zakodeku.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/1/0440/1322/4094/files/diablo_3_best_barbarian_build.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0455/4991/2229/files/donepezil_davis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8865/7051/files/93325800307.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6667/7655/files/zekakes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2230/9786/files/81076631897.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9521/2697/files/45052380409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/8974/1222/files/zcc_choir_songs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5384/1560/files/94903986009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7804/8161/files/autocad_architecture_2020_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7786/0516/files/sirodefi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/artemis_fowl_the_eternity_code_graphic_novel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/7778/2952/files/pci_incident_response_plan_template.pdfIn PDF document text
    • https://public-online.hmrc.gov.uk/lc/content/xfaforms/profiles/forms.html?contentRoot=repository:///In 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 1

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_off000046d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46D5 5084 bytes
SHA-256: b2361ce69765f77f0b2cb8f6abd172fca5f1bbef076e5863555ea80dab2e9004
font_01_sfnt_off00005804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5804 9756 bytes
SHA-256: 0f5a2fca58797bc059e5b0bdfc8dc9f7ead1cdd63c610c1a2f1f7ac769b8e68b

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