Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1dca363131a9467…

MALICIOUS

PDF

35.5 KB Created: 2020-08-04 02:21:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6695adc86d6031f355ab5ad3d964d5bf SHA-1: 306a0f494547f344696d2a4d2edbe0948c158bce SHA-256: e1dca363131a9467c6e3b08f6b69500c4155f645250cd69a062d03537838f8d2
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'practice tests' and a URL that appears to be part of a link farm designed for SEO manipulation. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

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.ru/pify?keyword=advanced+trainer+six+practice+tests+with+answers+pdf+2020 In PDF document text
    • http://files.thunderroadrunning.com/uploads/1/3/1/0/131070979/9155614.pdfIn PDF document text
    • http://files.aliahjan.co.nz/uploads/1/3/1/4/131453436/7a766.pdfIn PDF document text
    • http://files.mattarelloaway.com/uploads/1/3/0/7/130739020/jexepavugeg_basejik_retetapi.pdfIn PDF document text
    • http://files.paletteandpaper.com/uploads/1/3/1/6/131637125/jopip.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/1/0435/5679/8615/files/kabopok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1442/2677/files/92971796312.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1324/9944/files/vusatidasudagoxokudumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/rewezagijux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6780/8667/files/relimotefutelub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0311/5680/files/far_out_ride.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1293/2255/files/tiny_smiley_face.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3187/2166/files/24372002534.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0544/3237/files/57656783666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mulobovapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9145/1294/files/bomapinekezakigugutida.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 8

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_off00004819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4819 5692 bytes
SHA-256: aff8856d521cf0985656fcb9084e7a216dea2a86d0a3056ad9d91a658274e293
font_01_sfnt_off00005b92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B92 10376 bytes
SHA-256: 07500a56b3ce0e141b5a5f8573c07ccf6d21cdf33186b9b126473ab2806a84b1

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