Malicious PDF — malware analysis report

Static analysis result for SHA-256 cde8d21e088f8c2c…

MALICIOUS

PDF

41.1 KB Created: 2020-08-07 02:29:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 15d2460d2c833a83a80a6f0c28620ce1 SHA-1: 40d6f9822ac79c63be46b20588944f65b421b8f7 SHA-256: cde8d21e088f8c2c84fdaf0838f0b6140366e6f245f85c3a2f6f7d198da9c7bc
194 Risk Score

Malware Insights

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

The PDF contains multiple links to a redirector service, which is flagged as malicious. The document body and heuristics indicate a lure for a free PDF download, likely a phishing or malware distribution tactic. The presence of numerous external PDF links suggests an attempt to manipulate search engine results or distribute content through a link farm.

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=baixar+pdf+acrobat+reader+gratis In PDF document text
    • http://files.theironlions.com/uploads/1/3/2/6/132695325/73fbf408cfc5d72.pdfIn PDF document text
    • http://files.joyinthesmallthings.ca/uploads/1/3/1/0/131071067/241d60a860.pdfIn PDF document text
    • http://files.ruhlandmandolins.com/uploads/1/3/1/3/131398292/7b69559f3.pdfIn PDF document text
    • http://files.orrhotsprings.org/uploads/1/3/1/3/131380288/fekupokudesuwoze.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/1/0431/1485/6610/files/initial_consonant_blends.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/jezesonogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mipubafuminidumef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/99090868127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3012/6496/files/79962879528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9472/8103/files/gijile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/49221060197.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6982/4414/files/suvososuga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7839/3749/files/26422649328.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1026/7035/files/79668078349.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/14192803693.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 4

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_off0000603a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x603A 5548 bytes
SHA-256: 3b5d2122d72ac1a28da3a86cbcc328309dfdca6f3ff469a9e681011cfc93579d
font_01_sfnt_off00007330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7330 11332 bytes
SHA-256: d46e6104f36157a0dbc7138296e217c56075d74d2808a8cc9ebf63ac08e4e544

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