Malicious PDF — malware analysis report

Static analysis result for SHA-256 c85b37ecec0f8157…

MALICIOUS

PDF

38.1 KB Created: 2020-08-12 22:48:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0e207a8412d3b12bec3c922ec70a47cd SHA-1: 2bceeeeeccd33bba3533dcc31f6ae438295f8673 SHA-256: c85b37ecec0f8157815c8654851b4d6a711cd61f6283c5af6ef9a2ec3ec122f2
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that are part of a link farm, with one specific URL pointing to a redirector. This indicates the primary purpose is to redirect the user to a malicious site, likely for phishing or malware delivery.

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=isometric+and+isotonic+contraction+pdf In PDF document text
    • http://files.draworkshops.com.au/uploads/1/3/1/3/131398419/d19f34ac.pdfIn PDF document text
    • http://files.angelasnieder.com/uploads/1/3/1/8/131872070/30a868b54e16.pdfIn PDF document text
    • http://files.gardensatunityvillage.org/uploads/1/3/1/4/131407051/xavifoso.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/1/0434/5823/2480/files/wesopitukigato.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1034/2563/files/mopajijakojexinuroz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4921/3349/files/arminianism_vs_calvinism.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8494/7357/files/kopobaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8411/8171/files/epidemiologia_descriptiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5439/0687/files/6192188070.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2270/1976/files/kesekub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4300/4322/files/50779478177.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/rowatewikipunodebuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4145/5254/files/govubuzazabowafubunuguma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0835/0615/files/wubifetimupup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39646295774.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0227/3703/files/37020293335.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 5

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_off00005956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5956 5208 bytes
SHA-256: 0cb5b49e20302ebca8f64d01f77531803d322ae66677aea45f4a9108b10a5742
font_01_sfnt_off00006aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AEF 9528 bytes
SHA-256: 793f747921328bc66b99b6482f7e7d5e7f11c7398c3f22f9deef4a2fcdae11f7

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