Malicious PDF — malware analysis report

Static analysis result for SHA-256 75cbfd204ffd65df…

MALICIOUS

PDF

42.8 KB Created: 2020-08-21 21:53:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c712cfaa72b04659048702e4a753473b SHA-1: 77f9f09a2237fada13758dbdf4c7a799c2e12abd SHA-256: 75cbfd204ffd65df5d73f79eb0ea0f732405c7c2fd295303d5204b3621ae28d9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a redirector service designed to obscure the final destination. The heuristic firings indicate this is a malicious redirector and part of an SEO link farm, likely intended to lure users to phishing or malware sites. The document body itself contains a URL that matches the redirector found in the heuristics.

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.ru/pify?keyword=anjali+cbi+tamil+songs+free In PDF document text
    • http://files.vladimirblagoev.com/uploads/1/3/1/8/131856195/2574461.pdfIn PDF document text
    • http://weboraf.igmlegal.com/uploads/1/3/0/7/130739892/zavowavirow.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/1/0432/5664/3739/files/65506052539.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2556/1757/files/knowledge_encyclopedia_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/sasixaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2036/1629/files/insuficiencia_cardiaca_congestiva_tratamiento_nutricional.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7525/4937/files/free_html_template_for_ecommerce_website.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/bilofavabilukozajogibol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5646/3001/files/phone_background_size.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/31441496833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9064/8994/files/64343581294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/78585365417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4410/8453/files/grammar_test_tenses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0451/0887/files/amide_nomenclature.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 3

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_off00006091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6091 5408 bytes
SHA-256: a6be22d69dfbc3b5144301eed642475f661420f43926c4f891a368de7abb4374
font_01_sfnt_off000072d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72D7 14192 bytes
SHA-256: 5e6a894a0c9ccba7ae1f4973a04557db50bb28743274aa12fa49fcca46a7982a

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