Malicious PDF — malware analysis report

Static analysis result for SHA-256 04a9ecc72a242220…

MALICIOUS

PDF

37.3 KB Created: 2020-08-11 18:45:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dbca3012db95bd4e93412fe76dbc2a87 SHA-1: 80f317a03f430afc629fffce76110b406ca99ee3 SHA-256: 04a9ecc72a242220a31f5386bd2ea555f2c9361fa368ae7495b1b3c2842e5630
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains multiple links to a redirector infrastructure, identified as malicious. The document body, though partially corrupted, includes a URL that appears to be part of a phishing lure, likely intended to trick users into downloading a malicious file. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=%25C4%2591%25E1%25BB%2595i+file+%25E1%25BA%25A3nh+sang+pdf In PDF document text
    • http://files.thomasjcoppola.com/uploads/1/3/0/7/130739062/sedodifikuvifox.pdfIn PDF document text
    • http://files.melfoster.co/uploads/1/3/1/0/131070434/d7fd112ca57586.pdfIn PDF document text
    • http://files.kristinuhrig.com/uploads/1/3/1/8/131857562/6a02ea0.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/1/0435/2930/6263/files/61961002055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3290/1789/files/59351632593.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7577/8198/files/ctf_flag_in.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1222/6206/files/refedalake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6289/4498/files/fulevere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2359/7725/files/mike_byster.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5148/2278/files/kuwefokepikax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/kupuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89120948070.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5203/9324/files/que_es_un_acta_constitutiva_de_una_empresa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4580/6503/files/fuledodiriliwasaw.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 3

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_off00005112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5112 5692 bytes
SHA-256: a527e6425232a3c236c5132c9061f327f28cc7309d8e8b8060006b88e51c9a8c
font_01_sfnt_off000063a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A9 10356 bytes
SHA-256: e12aa0dd8d923241431c317320045e313d986f98526907248fc93a661ea8d1d2

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