Malicious PDF — malware analysis report

Static analysis result for SHA-256 1953e60cd8063fdb…

MALICIOUS

PDF

69.1 KB Created: 2020-08-12 01:53:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 910136be0a7258fe33092ce3f3a91fc2 SHA-1: 93308d475888bf59895b32a5c9bf7a184f031f10 SHA-256: 1953e60cd8063fdb909766b9c024c7dfb8ecea8eefd534351036ca33cefa4aa5
170 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a malicious redirector and part of a link farm, with a high ML classifier score. The document body, though heavily obfuscated, contains text related to 'payment' and a URL that appears to be a redirector. The presence of numerous external PDF links, including one to a known malicious redirector, strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=payment+of+bonus+act+form+d+pdf
    • http://vazakir.globalreg.info/uploads/1/3/0/7/130775918/dilabanovuxu-zefew.pdf
    • http://files.fortwayneago.com/uploads/1/3/2/6/132695408/kekuxudajosufebu.pdf
    • http://files.exuberancephotography.com/uploads/1/3/1/8/131871466/reputazapixebumuzub.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wurawosupamajo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3430/3912/files/46619292874.pdf
    • https://cdn.shopify.com/s/files/1/0436/0978/4482/files/21352634635.pdf
    • https://cdn.shopify.com/s/files/1/0440/0106/7166/files/tazog.pdf
    • https://cdn.shopify.com/s/files/1/0439/2602/8456/files/22902024020.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/fujedotuxilidowivagefale.pdf
    • https://cdn.shopify.com/s/files/1/0437/8951/6962/files/fukesibubidevejiwo.pdf
    • https://cdn.shopify.com/s/files/1/0439/6027/1006/files/xesazitukogosewomizumudil.pdf
    • https://cdn.shopify.com/s/files/1/0436/5107/2158/files/31215010503.pdf
    • https://cdn.shopify.com/s/files/1/0437/6847/9898/files/entereg_davis.pdf
    • https://cdn.shopify.com/s/files/1/0434/7278/1478/files/5436219540.pdf
    • https://cdn.shopify.com/s/files/1/0451/9782/0053/files/histologia_de_las_glandulas_suprarrenales.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_off0000c120.bin
2d1af051b16859374930ffed8234d87b21980d48a19e518141cf1e82a7874c6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC120 5348 bytes
font_01_sfnt_off0000d32c.bin
f895d6de7fb5c39803296be6a666d9869f3dabe39d01c90595918e704404305e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD32C 11364 bytes
font_02_sfnt_off0000f8e1.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E1 4324 bytes

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