Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec2e8e8bdd998f88…

MALICIOUS

PDF

35.9 KB Created: 2020-08-19 18:11:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 21fff1b5005c29f5560cd5b8a986a8ac SHA-1: 6e6c09b0529299ace4cb59600080d22cf1aa99d5 SHA-256: ec2e8e8bdd998f887e925d746d10ba9fd23fb75c5b735947cdb9dbf29683fbae
194 Risk Score

Malware Insights

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

The PDF contains a mass link farm, with a primary malicious redirector URL embedded in the document body. The ML classifier strongly indicated maliciousness. The document body text, though partially corrupted, contains the URL 'https://ttraff.ru/pify?keyword=chok+chok+holographic+sheet+mask', suggesting a lure to a product page that redirects to malicious content. The presence of numerous other PDF links further supports the link farm heuristic.

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=chok+chok+holographic+sheet+mask In PDF document text
    • http://siwajor.projectechelon.org/uploads/1/3/2/8/132814930/wezuxokubazi_dotelup.pdfIn PDF document text
    • http://files.backyardboyslandscaping.com/uploads/1/3/2/7/132711999/4871641.pdfIn PDF document text
    • http://files.lavenderoomp.com/uploads/1/3/0/8/130873833/7fee560.pdfIn PDF document text
    • http://files.weldcountymeatgoats.com/uploads/1/3/1/4/131410685/zonaz_zazeko_beturo.pdfIn PDF document text
    • http://jojadipo.baregardenfarms.com/uploads/1/3/2/6/132682076/biwubejevefoga.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/1/0431/7069/3282/files/22397959883.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7194/7423/files/teamwork_in_business.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/calculation_of_mean_median_and_mode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/1961/2839/files/piwapovurafevudaxufos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5425/9606/files/kesatafojadafusikiwopo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1775/7095/files/6758645900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/9403/5880/files/14184459785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5395/7799/files/spanish_numbers_worksheet.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_off00004e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E89 5316 bytes
SHA-256: 5df4a74c838e5daa6392d6a5d8260551104a0adc9d619933ee7270012fdf8d24
font_01_sfnt_off0000607a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x607A 10212 bytes
SHA-256: c734118f2768745bad5083c502ed2e1c00b1306be9cc3f7d1e72d17c0f783c5b

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