Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8756c571c78f2d5…

MALICIOUS

PDF

44.2 KB Created: 2020-08-09 05:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4637d007cd5427c98c90be702ffaf45b SHA-1: a2671c99725d3f93684b3a66abdefbf3480c3b65 SHA-256: c8756c571c78f2d53aae27ce4d98f944e1866b4318fb4c1abaee74c6956bd5eb
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 a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which likely serves as a lure for phishing or malware delivery. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=baa+baa+black+sheep+poem+pdf', indicating a direct attempt to redirect the user. The presence of numerous PDF links suggests a strategy to obscure the final malicious destination.

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=baa+baa+black+sheep+poem+pdf In PDF document text
    • http://files.yourhomeopathicsolution.com/uploads/1/3/1/4/131437307/kenededufi-rulorexujisegup-kigij.pdfIn PDF document text
    • http://files.bloomingfulbirths.co.uk/uploads/1/3/0/9/130969371/4362299.pdfIn PDF document text
    • http://files.tacomateasandherbs.com/uploads/1/3/0/8/130874431/05e8759a66575.pdfIn PDF document text
    • http://gawumaro.counselingcentersofmichigan.com/uploads/1/3/1/4/131438405/3968836.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/1/0437/8427/4081/files/tuwixutofuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6369/6805/files/bepujofukon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0934/2621/files/59163685853.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2995/2674/files/87202309272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0256/8599/files/89891750642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9515/5105/files/jamugifomobaxin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0213/4681/files/nom_riesgos_psicosociales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4763/3575/files/39300195811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7329/0908/files/sisotemeri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wudogezemolajefenupil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3000/3358/files/wanemapuzekuvo.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_off00006e2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2E 5552 bytes
SHA-256: 1ba67d8491946fd0c7fbcafb0575d3db1c46bbeb7b29e482cedda815ceb29074
font_01_sfnt_off000080ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80EC 10240 bytes
SHA-256: 8453c6ce5c708085a812165a7ec54b474c99b7f8541d5cd2ee129d314eeb3fae

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