Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb6f2ebfdfd10c7b…

MALICIOUS

PDF

50.8 KB Created: 2020-08-22 18:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f9c3527abeae281b94640e5a97801977 SHA-1: e6679e846ae515a4d1836da093f3e61ee5e056cd SHA-256: fb6f2ebfdfd10c7bafeeebd20348d68d5e8843b8fe1976d7e5e0553a7d558aff
194 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier as malicious. It contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a known malicious redirector at 'ttraff.ru'. This suggests a link farm or redirection strategy to obscure the ultimate malicious destination. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=inequalities+coloring+worksheet+pdf' and other Shopify-hosted PDF links, reinforcing the link farm tactic.

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=inequalities+coloring+worksheet+pdf In PDF document text
    • http://files.dare2dreambigger.com/uploads/1/3/1/8/131856446/753689.pdfIn PDF document text
    • http://tejur.sghock.com/uploads/1/3/2/3/132302868/3436268.pdfIn PDF document text
    • http://zasonowu.simlessonswithmissnewnham.com/uploads/1/3/0/7/130739061/6611980.pdfIn PDF document text
    • http://tobilaf.thegeeksupreme.com/uploads/1/3/2/6/132682076/9296250.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/1/0432/1961/5904/files/abb_ach550_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7786/8443/files/tiveranimitusige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8942/8637/files/zizijalevoratokanamol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4624/8358/files/wabogur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2935/6959/files/subevoxukufevema.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1558/5448/files/78578052864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8280/9508/files/25169717304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65529241957.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7794/9848/files/70232316719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3688/4642/files/buxton_secondary_school_uniform_shop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/8402/5751/files/mba_admission_essay_samples.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_off000087ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87CE 5636 bytes
SHA-256: 791cc10ce7f2604133876f139b705023d50f993afc3a0d5be1b4676f8862e331
font_01_sfnt_off00009af5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AF5 10456 bytes
SHA-256: 17f5645edd315bf8194fc28fbaf5a3fbf82ae945060a6f568ef5c33f7639caf7

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