Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3bbbe330c5748e6…

MALICIOUS

PDF

43.5 KB Created: 2020-08-07 15:10:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: baa6094304997459ab5b23d642b55e7a SHA-1: f6379b65d231d7a45a67a4eeb49b0c175013358f SHA-256: b3bbbe330c5748e6ade8e66d876d233a7fb214f063ed49d5a9d34000217a3c72
194 Risk Score

Malware Insights

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

The PDF was flagged for containing a large number of external links, with one link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains references to the malicious URL and several other PDF URLs hosted on various domains. This suggests a link farm or SEO poisoning attack designed to either distribute malware or phish users.

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=abordagem+quali+quantitativa+pdf In PDF document text
    • http://xikokuka.dthaikitchenthornwoodny.com/uploads/1/3/2/6/132681670/52cd3ea.pdfIn PDF document text
    • http://files.jjamtech.com/uploads/1/3/1/6/131636692/ketusikowe-xetodila-xavapilibu-kazadutuvofu.pdfIn PDF document text
    • http://files.newlightink.com/uploads/1/3/1/3/131383821/1e9cf.pdfIn PDF document text
    • http://files.episcopalchurchredding.org/uploads/1/3/0/7/130776521/5247769.pdfIn PDF document text
    • http://files.cynthiamade.com/uploads/1/3/1/4/131483955/fodibulupezejamavuvu.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/1/0432/6768/6558/files/kisigomew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/41162091551.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6535/2095/files/fagoxodogewajeziron.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8658/4733/files/fapirixebubesot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/7095/8241/files/biliary_tree_anatomy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2183/6193/files/pigiredekonesalijapagawej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2262/8502/files/architecting_modern_data_platforms_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3209/2573/files/abc_colouring.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9593/9488/files/pikeregivegobikup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xidab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1265/1170/files/berefafurigo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4902/5690/files/7024285717.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 5

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_off000068ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68EE 5496 bytes
SHA-256: edbd2b48284995ba519c91d7bc0463f5065bacfc1509123b7d436f8cf09f1458
font_01_sfnt_off00007b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B89 11744 bytes
SHA-256: 3d67fb9a523e365f92a7a8b754cf36688015d2347c62425cd0a7207a5586b194

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