Malicious PDF — malware analysis report

Static analysis result for SHA-256 5edb6de202f2d41a…

MALICIOUS

PDF

55.2 KB Created: 2020-08-06 10:01:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d7eaa25d02137c5e28a42fb9edd482c SHA-1: 3e76cf03771b33b5092111833363296855ef3f55 SHA-256: 5edb6de202f2d41a67bd76d38c3af94da5ae0bf7ee7cbc4dc03b22c3ac46cc29
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to link farms and redirectors, indicating a malicious intent to drive traffic to potentially harmful sites. The primary malicious URL identified is https://ttraff.cc/pify?keyword=disneyland+california+map+pdf+2020, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to the same URL and other PDF links, suggesting a coordinated effort to distribute malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=disneyland+california+map+pdf+2020
    • http://files.haverhillauthenticsicilian.com/uploads/1/3/1/8/131859895/xejakederiber.pdf
    • http://govil.sapir-forum.org/uploads/1/3/1/6/131606027/2050827.pdf
    • http://files.eng.guesteyes.com/uploads/1/3/0/8/130813769/5548245.pdf
    • http://files.professionalcapitalpartners.com/uploads/1/3/1/4/131438766/4121815.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wososopozabe.pdf
    • https://cdn.shopify.com/s/files/1/0432/6529/4504/files/96157317306.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/rujuporazimobodoge.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3645/files/luvalibalavewige.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/69691492418.pdf
    • https://cdn.shopify.com/s/files/1/0434/8005/5965/files/24759423785.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/74535711799.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3982/files/zosezoligomotirasowubu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2630/0575/files/65698375922.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2763/files/befizaruregava.pdf
    • https://cdn.shopify.com/s/files/1/0432/6732/6110/files/fefuje.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000090ba.bin
ceb3c40e1233171d543cbd33ab7e906fa6be9f7cd19d8d813ae36d0092a4aa8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90BA 5676 bytes
font_01_sfnt_off0000a3fa.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3FA 1800 bytes
font_02_sfnt_off0000ac88.bin
4d6f4221244498e2077c33d25ba8a729073ddde72bb092a71caad21c992ec007		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC88 10260 bytes

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