Malicious PDF — malware analysis report

Static analysis result for SHA-256 5597e012ed40db33…

MALICIOUS

PDF

33.6 KB Created: 2020-08-04 13:24:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 12b1fff086c295ad957e4c2cd99cc96c SHA-1: f91e33e38f086bdd1f39da010ddb9e1b8831d5f8 SHA-256: 5597e012ed40db332f3b110e9ecf384b37516b6f0837db679b9ee2be253fcf31
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'cdf to pdf calculator'. The presence of numerous external PDF links, as flagged by 'PDF_SEO_LINK_FARM', further suggests a malicious intent to drive traffic to potentially harmful sites. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=cdf+to+pdf+calculator In PDF document text
    • http://files.christopherhagenconsulting.com/uploads/1/3/1/4/131453215/4939323.pdfIn PDF document text
    • http://files.ofcrimsonindigo.com/uploads/1/3/0/7/130740517/wobafofir_bojajifefurisi_fosopo_polubuzakijal.pdfIn PDF document text
    • http://files.fourseasonsrentalequipment.com/uploads/1/3/0/8/130874265/zoragadunovetaxe.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/1/0448/9238/9531/files/nef_business_plan_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/668380592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3521/4503/files/65575352450.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bokowolexom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4817/2710/files/rovowubeve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6355/8815/files/hot_potatoes_wiggles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3032/3095/files/tawijofazenanaxanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6901/3158/files/42218645175.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8432/4770/files/49217749033.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6284/5859/files/88057550261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/44399285842.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_off00004661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4661 4876 bytes
SHA-256: 2cff65b38ed05b64de971250580a8816970f71cf7d0d4ec34067c9bd2f9500fb
font_01_sfnt_off00005703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5703 10284 bytes
SHA-256: f1d869163395ee1eafbaa3739735d877c2303c18d58f90e2691200530d75faa2

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