Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dd92a071bc013e5…

MALICIOUS

PDF

44.4 KB Created: 2020-08-16 15:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6455b7ee951bca62d1daae5e54a383e SHA-1: c6ee8dfc93f9c1d2b80ecce70095d3d157be7fdd SHA-256: 5dd92a071bc013e5638091a5875f05f8b9f70e21918eb362bea18d4f02de90f8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text related to legal forms and a URL that aligns with the advance-fee scam lure identified by heuristics. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm intended to distribute malicious content or engage in SEO manipulation.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=statutory+warranty+deed+form+washington+state
    • http://files.debrebisrat-mn.com/uploads/1/3/1/0/131070458/worej.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0436/0224/7838/files/wilalorubeniwakifozelusix.pdf
    • https://cdn.shopify.com/s/files/1/0437/4803/2673/files/eu4_austria_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/83380330593.pdf
    • https://cdn.shopify.com/s/files/1/0433/8742/0835/files/cateter_venoso_periferico_de_linea_media.pdf
    • https://cdn.shopify.com/s/files/1/0434/2756/1628/files/rekoradaza.pdf
    • https://cdn.shopify.com/s/files/1/0431/7495/3120/files/dilejetekegen.pdf
    • https://cdn.shopify.com/s/files/1/0429/8348/9690/files/48696926671.pdf
    • https://cdn.shopify.com/s/files/1/0432/5212/1762/files/pewazoreb.pdf
    • https://cdn.shopify.com/s/files/1/0433/7342/8890/files/gutilavutiruvulusa.pdf
    • https://cdn.shopify.com/s/files/1/0437/7909/6728/files/46505756153.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_off00006136.bin
90c70f2424ff90b47c1ad33eab873a02b4f8b4bbebd2fa7c4248db542a5b8083		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6136 5468 bytes
font_01_sfnt_off000073ac.bin
98b839c32668eb36f3c314bc1757ba85dc33cc77faff2724cfd8482881a43210		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73AC 10180 bytes
font_02_sfnt_off0000967f.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x967F 4324 bytes

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