Malicious PDF — malware analysis report

Static analysis result for SHA-256 e18dba36937fde87…

MALICIOUS

PDF

48.1 KB Created: 2020-08-16 22:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3b9d59a6e02656d503940ee04d640bc0 SHA-1: 847a5f089decf402dcc6ea311e83c3ae7adf699d SHA-256: e18dba36937fde871a6cd5fb9b610f14723c7ac2c4d61f32dabd20b5fbc82112
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains text referencing 'Base64 to pdf swift 4' and includes the malicious URL. This suggests the document is designed to trick users into visiting the redirector, likely leading to further malicious content or downloads.

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=base64+to+pdf+swift+4 In PDF document text
    • http://waselati.countryhides.com/uploads/1/3/0/8/130814526/jexatutavugemafad.pdfIn PDF document text
    • http://files.belantine.com.au/uploads/1/3/2/6/132695391/winurepu-riramanogat.pdfIn PDF document text
    • http://sakapesug.k-eleven.com/uploads/1/3/2/8/132814930/9107046.pdfIn PDF document text
    • http://sepudup.rileyannsound.com/uploads/1/3/1/3/131381078/2605ffc055b15b.pdfIn PDF document text
    • http://files.stjoespdr.org/uploads/1/3/0/8/130814085/987d9636f64.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/1/0430/3316/5986/files/14037939043.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2324/4191/files/dolafirisuliburewiwapijam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9250/6779/files/cage_questionnaire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7202/7814/files/wodexes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0718/0954/files/catfish_farming_business_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4398/7361/files/huffingtonpost._com_section_politics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5757/8138/files/destiny_2_prima_official_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1690/3080/files/the_crooked_man_poem.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5878 5292 bytes
SHA-256: 43d089ec2cf2cf31b2c58906a34755bdd49bde4a0bd936a13f5bddc089bd196d
font_01_sfnt_off00006a9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9A 4624 bytes
SHA-256: 2ae1afcfef2605d3669e7a55845fe9ba4d9aaf0f8d14006d94c6cf5e5645ef25
font_02_sfnt_off00007735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7735 11496 bytes
SHA-256: 3377180f276c3a30f27f2fd2692572d0b0d847b6c82463211ad5c9e2e5a8e612
font_03_sfnt_off00009ec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EC1 16036 bytes
SHA-256: 9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940

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