Malicious PDF — malware analysis report

Static analysis result for SHA-256 75af60005d5d1a2d…

MALICIOUS

PDF

43.2 KB Created: 2020-08-24 18:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9040f131086ef8f63995efd01fe9e717 SHA-1: 5facccc3413075bb559ab8989afc6d488609dfd5 SHA-256: 75af60005d5d1a2db41195e73cfcf0997bbf47aa567c783de3262583f5c7585e
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, which is a strong indicator of malicious intent. The document body, though heavily obfuscated, contains text suggesting urgency and includes the same malicious URL, reinforcing the lure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm used to distribute malicious content or for 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=basic+contract+of+employment+template+uk
    • http://files.camarillochamber.org/uploads/1/3/1/4/131437064/c42b77.pdf
    • http://files.bridecon.com/uploads/1/3/0/7/130739916/8992394.pdf
    • http://files.pestcontrolvegasnv.com/uploads/1/3/2/8/132815359/mobox.pdf
    • http://files.mysmilepaparazzi.com/uploads/1/3/1/3/131379312/54ebc3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/4157/9420/files/kulavomelomomuko.pdf
    • https://cdn.shopify.com/s/files/1/0429/3056/9382/files/86819964999.pdf
    • https://cdn.shopify.com/s/files/1/0440/4235/4853/files/11977017439.pdf
    • https://cdn.shopify.com/s/files/1/0432/2672/6568/files/84427552979.pdf
    • https://cdn.shopify.com/s/files/1/0430/7537/1159/files/91050186889.pdf
    • https://cdn.shopify.com/s/files/1/0434/0292/0086/files/analog_fundamentals_a_systems_approach.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/6492346064.pdf
    • https://cdn.shopify.com/s/files/1/0432/9714/4990/files/79320352597.pdf
    • https://cdn.shopify.com/s/files/1/0439/5591/2862/files/managerial_accounting_14th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/8647/1587/files/the_flat_belly_diet.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_off00006b12.bin
dffcf7541bb21b84e3b8531e595f2aa597664369899dc61d4c93a0f800c4452a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B12 5376 bytes
font_01_sfnt_off00007d43.bin
20016b6534c9767a48e3b6f1ad82e4b3cc9c385483fcb4f47c604a3f7125cc26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D43 10076 bytes

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