Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec822e2c40cecdb4…

MALICIOUS

PDF

40.0 KB Created: 2020-08-22 13:07:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b031b47f156e17fe3105cbf3dea9a13b SHA-1: c6347ec4d1de04e0c2fde32355198f534e0207ee SHA-256: ec822e2c40cecdb4ff87f90c73f40915d601c57947b5226bb8d5bc116671bf42
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains URLs that are part of a link farm, suggesting an SEO spam or phishing lure. The primary malicious URL identified is ttraff.ru, which is known to host redirectors.

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=patofisiologi+patent+ductus+arteriosus+pdf In PDF document text
    • http://files.sharidellapenna.com/uploads/1/3/0/8/130813988/romijojeledatuxusepo.pdfIn PDF document text
    • http://files.parkhillbowlingclub.com/uploads/1/3/2/8/132815154/4047543.pdfIn PDF document text
    • http://files.afrogood.com/uploads/1/3/2/7/132740836/ab98a741.pdfIn PDF document text
    • http://files.richardmccooey.org/uploads/1/3/2/6/132695741/eef02688ec10c5.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/1/0437/7139/6257/files/carcinoma_basocelular_elsevier.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/wonijixam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1129/2827/files/malug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1910/7480/files/almanach_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/69420246052.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sibubemazalomasedexikeme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4854/3142/files/56028971968.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2223/8374/files/coliformes_fecais.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/84825022799.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1829/6216/files/90669112336.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2737/9877/files/aciclovir_eye_ointment.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_off00006008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6008 5324 bytes
SHA-256: f13dacf2c96299fb0d4e0fecf3af08625a5f3bbfe0c96f90715a4c39c3324e78
font_01_sfnt_off00007230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7230 9672 bytes
SHA-256: 98342a11e4c06879f79a5590fe81f0f560e2a3f202521b9de2242f5d66ab915e

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