Malicious PDF — malware analysis report

Static analysis result for SHA-256 7882473b97e47159…

MALICIOUS

PDF

46.5 KB Created: 2020-08-12 12:02:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d2c35c86af31dab9dd79ce4d21eb86af SHA-1: 2b16041e5ca6b0a811904a66d13502b4bc23f827 SHA-256: 7882473b97e4715966746bc21d89734a7e97ae55e035bcce2e8dba8035815235
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL pointing to known malicious infrastructure, disguised as a free English speaking course book. The ML classifier strongly indicates maliciousness. The embedded link farm suggests an attempt to generate traffic or distribute malware via SEO manipulation.

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=english+speaking+course+book+pdf+file In PDF document text
    • http://files.inveniremedicos.com/uploads/1/3/1/6/131607467/694ad39.pdfIn PDF document text
    • http://files.run-u-nut.com/uploads/1/3/0/7/130775539/delidusujujuf_ginaxokufo_poxefer.pdfIn PDF document text
    • http://files.sticklevarietystore.com/uploads/1/3/0/8/130813526/448bf95f.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/1/0429/1877/2903/files/77135139300.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/kejigokota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4831/2736/files/lisodulebidoxiziselug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/sikoweretirefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8879/6064/files/96150741508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6584/3620/files/nikon_d90_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/55657461109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0595/9588/files/98267193818.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3653/9045/files/starbucks_availability_form_canada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7622/3129/files/lurufidinenat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56751463133.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_off0000776f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x776F 5580 bytes
SHA-256: 836d73862a59751e624905430e807dd2c7b06bbe69f1973521431514aa9ce77a
font_01_sfnt_off00008a4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A4F 10120 bytes
SHA-256: c0ab8677654242540eaea3b867e7ccf4516cff4f2e1f764e5794befb8c607020

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