Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f49978385ce94d7…

MALICIOUS

PDF

41.0 KB Created: 2020-08-05 12:57:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: af85461748469ef9833f6e90f8577bae SHA-1: e85b555bfe8fab592e0b1af837de0ccf81eb0117 SHA-256: 0f49978385ce94d7098f88cb85a1be03111c64f07ada582b9082053ae8f4c314
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to a redirector service known for malicious activity. The document body and embedded links suggest a lure to download other PDFs, likely as part of a link farm or phishing scheme. The ML classifier also strongly indicated maliciousness.

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=reading+comprehension+worksheets+pdf+grade+2 In PDF document text
    • http://files.canarysquare.com/uploads/1/3/0/7/130739780/luzuninupobo.pdfIn PDF document text
    • http://files.birth-roots.co.uk/uploads/1/3/1/4/131437454/pifesup.pdfIn PDF document text
    • http://files.robertjbrunet.com/uploads/1/3/1/3/131383826/fidasotapu.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/1/0429/6815/4278/files/roosa_master_injection_pump.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4354/4488/files/78617959935.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8206/2753/files/75076242444.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5221/9030/files/faux_amis_anglais_francais.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/pigigajugewikafimenevan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2711/1841/files/38385120809.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6526/9669/files/16210078446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4511/6311/files/tosuzadiwixoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7849/2072/files/mikib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5320/3102/files/17735627074.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_off000060c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C7 5832 bytes
SHA-256: 73f2b24533013db9736f0e7f7a9593869b56c66c1d58d08bb5298e6680cfa02b
font_01_sfnt_off0000749a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x749A 10080 bytes
SHA-256: 235fef634d0366d2c4eee9f06b575f9635761bff48b8a712910bffc4e094d9c9

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