Malicious PDF — malware analysis report

Static analysis result for SHA-256 c798dfe4c51c587d…

MALICIOUS

PDF

41.6 KB Created: 2020-08-18 13:05:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b0de104c314aad790e84f312136347f9 SHA-1: 95bb8000b1644ee18ea6cca87c504f00d4dd9dae SHA-256: c798dfe4c51c587d69bd0bde74f7449b1a8d7dd995f26f885b58dafed46e3608
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Mailchimp html template design'. The presence of numerous external links, including one to a malicious redirector, suggests an attempt to direct the user to malicious content. The PDF was flagged by a machine learning classifier as malicious.

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=mailchimp+html+template+design In PDF document text
    • http://kalud.breidholtfestival.com/uploads/1/3/1/4/131406717/mibunupuxa.pdfIn PDF document text
    • http://files.cingirard.com/uploads/1/3/2/6/132682048/nokadovevogokidoveke.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/1/0449/5812/2139/files/remove_watermark_from_adobe_pro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0179/1132/files/74824065961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6955/5356/files/71136517225.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4294/7750/files/tawetoxofaxokij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6805/4940/files/27964015213.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6327/9767/files/zixonagexarofitusorezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/91623661982.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6049/3474/files/2157177092.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8339/7275/files/manualidades_con_botellas_de_plastico.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
🗂 Part of campaign: livingmetroeast.com 4 samples

Related samples 1

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_off00006417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6417 5396 bytes
SHA-256: b214ae6071532c33e80356c5cc4b793ff07ceb042b02c4d3a91fdbb489cb8373
font_01_sfnt_off00007652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7652 10448 bytes
SHA-256: 56a773f21e387d50203b123a538da58643cfd61e75c3ef2cc9630c5546074454

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