Malicious PDF — malware analysis report

Static analysis result for SHA-256 63070c93dbc927aa…

MALICIOUS

PDF

58.7 KB Created: 2020-07-31 09:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 359ec790b424726df7843790b9529142 SHA-1: 710696ddbb2d3a42fa0a1899d1e8d0ed303968c6 SHA-256: 63070c93dbc927aac12a6c4f6cdffdcd2e116f56d9d5932b2de36b8cdfda591f
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be obfuscated or corrupted, but the presence of numerous links suggests a link farm or redirection attack. No scripts were extracted, but the PDF structure itself is used to host and distribute these links.

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.ru/pify?keyword=access+to+neighbouring+land+act+1992+pdf
    • http://files.tinagutierrezartsphotography.com/uploads/1/3/0/7/130775383/remax-taxopugazaledu-fuluxibejurifuj-lavosiraleset.pdf
    • http://files.kansascityrosesociety.org/uploads/1/3/1/4/131408798/vofad-xomimupimiw-juvuxekajup.pdf
    • http://files.seaintheskyhealing.com/uploads/1/3/1/4/131407980/470024f17b.pdf
    • http://files.murrayvilleanimalhospital.ca/uploads/1/3/0/7/130776016/7a9f02.pdf
    • http://files.peacenaperville.com/uploads/1/3/1/0/131070459/fagizir_pinobato_tudap_bomesujifav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4489/6917/files/5389852270.pdf
    • https://cdn.shopify.com/s/files/1/0431/6689/2191/files/memodawejopasul.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/27887065422.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wonazonuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0697/5382/files/78025272540.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3502/files/kukifodudimelipekiraji.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/13946632626.pdf
    • https://cdn.shopify.com/s/files/1/0433/4980/3162/files/lavutepitowutunas.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/gelolivuzebegujiluvi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9252/4702/files/pusudusanumisad.pdf
    • https://cdn.shopify.com/s/files/1/0435/7432/9507/files/52803275630.pdf
    • https://cdn.shopify.com/s/files/1/0440/9730/6776/files/66219278452.pdf
    • https://cdn.shopify.com/s/files/1/0433/6382/7871/files/mabanukuniposeduwomemiw.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_off0000a758.bin
130e3b48e4efec1f0202d6189e02e00be1428eae7943598b9072a7586c978c09		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA758 5768 bytes
font_01_sfnt_off0000bae6.bin
f66b5632c68d8e9ca87933ea610277c23cf34cef109062435d8556f66b154387		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE6 9980 bytes

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