Malicious PDF — malware analysis report

Static analysis result for SHA-256 8caa8003acd71a08…

MALICIOUS

PDF

43.2 KB Created: 2020-08-17 13:58:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6e0692a795e7ca42aa22a93ae555b0b3 SHA-1: 2b501331ef2bf8c568beebf3f96d50117836cabd SHA-256: 8caa8003acd71a08530044960b44e9164ed7f9616c9e41afc525059fecf06869
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with the primary URL pointing to a known malicious redirector. The heuristic firings indicate this is a link farm designed to manipulate search engine results or lead users to malicious content. The document body, though heavily corrupted, contains references to the primary malicious URL and several other PDF files hosted on various domains, suggesting a broad distribution or redirection strategy.

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=warmane+icecrown+leveling+guide+horde In PDF document text
    • http://files.ukcpioneerdays.com/uploads/1/3/0/8/130814298/fubazirok.pdfIn PDF document text
    • http://files.ghesslaumagrady.com/uploads/1/3/1/8/131857920/4603701.pdfIn PDF document text
    • http://files.arkansaspropertymaintenance.com/uploads/1/3/1/4/131408581/3559133.pdfIn PDF document text
    • http://latizit.solomomma.com/uploads/1/3/1/6/131607254/botove.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/1/0430/6750/6845/files/activemelody_jam_tracks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jatud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2992/8863/files/basetiror.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/chemical_bonding_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/4819/3439/files/miwukat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9540/0356/files/rumozigiwomozutix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5271/8494/files/dominando_as_aberturas_de_xadrez_john_watson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/online_to_word_converter_50_pages.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/mizijerulosugoduju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9468/8412/files/nipukuwebipob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1610/8707/files/adopter_categories.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 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_off000069b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69B2 5340 bytes
SHA-256: 506db66e9c7fdb6b63fd326eb1f42cc93aa95721ebb33d19eea91141403b1b6a
font_01_sfnt_off00007bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC1 10628 bytes
SHA-256: 0212a266bf52fc58331daa786c912e29d8f65d4a16930488ee1e91af32cfa0e3

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