Malicious PDF — malware analysis report

Static analysis result for SHA-256 911a2710d76e1893…

MALICIOUS

PDF

110.7 KB Created: 2020-08-07 23:52:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8b6f4044996a69604400bb93dd87bbf8 SHA-1: 5f4f959d4830f87a9a1cc458b4bb552427ca54f6 SHA-256: 911a2710d76e189385a4cd5137143ba1f8e489e798b1604eee474866c62682c0
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is part of a link farm designed to trick users into downloading content, as indicated by the PDF_SEO_LINK_FARM heuristic. The embedded URL in the document body, 'https://ttraff.com/pify?keyword=principles+of+ambulatory+medicine+pdf+free', confirms the lure of a free PDF download.

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.com/pify?keyword=principles+of+ambulatory+medicine+pdf+free In PDF document text
    • http://files.trainyourdogswithheathersmith.com/uploads/1/3/1/4/131452800/6505242.pdfIn PDF document text
    • http://files.defy-foundation.org/uploads/1/3/0/7/130775462/fosafenedutito.pdfIn PDF document text
    • http://files.lacanadalimo.com/uploads/1/3/1/3/131382395/jebunume.pdfIn PDF document text
    • http://files.wazarahappyshop.com/uploads/1/3/0/8/130873983/pulajoj-fifebaraja-gojabubiloxemif-dokeku.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/1/0431/8615/9767/files/60493069886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/declaration_of_assets_and_liabilities_format_in.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3881/0023/files/47661596956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1213/6855/files/56517387929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3276/3816/files/babanelimumukus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8561/7566/files/41541265195.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/32403907244.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dilos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8491/3565/files/92485540689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9443/4207/files/73246384701.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/aliphatic_and_aromatic_hydrocarbons_ncert.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/xamigusuzizifosobasapipoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0451/0887/files/gemugimidov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/komidadesewibos.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_off000171f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171F7 5544 bytes
SHA-256: c0533dea8fe43f006bc9fe638f13131ca0056539d7f8ab24b056c91ba1336ff9
font_01_sfnt_off000184bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184BC 12076 bytes
SHA-256: 92df90d32482d023373c6567a290b350f14b8dbb7ab02ea09e0c2e9592a7ce75

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