Malicious PDF — malware analysis report

Static analysis result for SHA-256 63ba8039598e2fda…

MALICIOUS

PDF

47.3 KB Created: 2020-08-08 20:17:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55ab6738da6133f25cf087307ee128a5 SHA-1: 215418c19d498d42c4c4d82a887dcee780426ebe SHA-256: 63ba8039598e2fda207135b549d3e9c4efa9bceea600d7f7b8e48ddc4ca06cd2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external resources, masquerading as a document about boiler efficiency. The primary link, 'https://ttraff.com/pify?keyword=factors+affecting+boiler+efficiency+pdf', is identified as a malicious redirector, indicating an attempt to lead the user to a harmful destination. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=factors+affecting+boiler+efficiency+pdf
    • http://files.balclutha.school.nz/uploads/1/3/1/4/131452842/befidazureromij.pdf
    • http://files.ourhousecallvet.net/uploads/1/3/1/8/131857071/semosi-kimixasobal-baxokuw.pdf
    • http://files.triplejcreations.com/uploads/1/3/1/3/131379301/rewegix.pdf
    • http://files.mickpedderelectrical.com/uploads/1/3/1/4/131406412/29f3a.pdf
    • http://files.sweetnlowdachs.com/uploads/1/3/2/7/132740620/mudesusag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4489/6917/files/rv_comfort_zc_thermostat_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/0414/8381/files/74252320543.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3267/files/lepojokekurovodozamefilug.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/48587191685.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nubizasijimowedemo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7310/0184/files/65743289185.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0597/files/67999506824.pdf
    • https://cdn.shopify.com/s/files/1/0431/9716/9824/files/90844861033.pdf
    • https://cdn.shopify.com/s/files/1/0428/5782/4419/files/69253679516.pdf
    • https://cdn.shopify.com/s/files/1/0432/2584/1819/files/jomolodosaxenetifuva.pdf
    • https://cdn.shopify.com/s/files/1/0429/9731/7785/files/winter_bgc_instagram.pdf
    • https://cdn.shopify.com/s/files/1/0432/8200/6171/files/warhammer_40000_necrons_codex.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/mikosivovebazigi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9649/0663/files/98724623605.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/94740062602.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079f7.bin
c9d1ad647e719275790e9106984900624cb59fd1b493bca9886da0938346961d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F7 5520 bytes
font_01_sfnt_off00008ccf.bin
c78f29ff2cb16f28b11266975f68a7f443752a36652ae9bed2995f3ce5713dd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CCF 10080 bytes

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