Malicious PDF — malware analysis report

Static analysis result for SHA-256 d51b605a7cb8c870…

MALICIOUS

PDF

43.8 KB Created: 2020-08-07 15:33:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 562594ca083d65cffb0c7916d8fc343b SHA-1: b4dad911eff4002aca4de4534acb3a885f9e9079 SHA-256: d51b605a7cb8c870929f32a1cc99fca247019730bc380c2bccc963fd0610b464
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is likely used to obscure the final destination of the malicious payload. The document body and embedded links suggest a lure to download files, potentially related to 'Ansible tutorial pdf download', which is a common tactic for distributing malware.

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=ansible+tutorial+pdf+download In PDF document text
    • http://vogibozop.bekindbeyou.com/uploads/1/3/0/9/130969754/ac39608ced0ac9.pdfIn PDF document text
    • http://files.kevintfahey.com/uploads/1/3/1/4/131483185/40f72697805306.pdfIn PDF document text
    • http://files.mirmss.org/uploads/1/3/1/6/131637163/d47c9cb98fab5.pdfIn PDF document text
    • http://files.caralarmandradio.com/uploads/1/3/1/6/131606730/658754.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/1/0429/1588/9305/files/dugimavafilikolevutapimos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1021/9432/files/1591950191.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8209/5519/files/rekeno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9462/0837/files/26042893535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3428/0090/files/wijijisumupolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/4132599785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1510/0826/files/50432456598.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3367/4396/files/49619462797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4012/0733/files/50860810052.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9495/0559/files/zumimisexojiwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0180/6997/files/91647031651.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/68513135127.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 4

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_off00006d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D25 5256 bytes
SHA-256: a9a88d3a7a9bbbff6737b16c905dd2ca5d4ccfcaf484a9ec1228ac49b13688e0
font_01_sfnt_off00007f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1E 10288 bytes
SHA-256: 95763df43f251ebacece41ed9bc6652300e0c4bb5b7bc969b3fd608cb97b73cc

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