Malicious PDF — malware analysis report

Static analysis result for SHA-256 0730888433fc4447…

MALICIOUS

PDF

40.9 KB Created: 2020-08-21 16:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce701d74a5b16f5125eabe5123383131 SHA-1: 81d7c8e28eb3b643c39d6f1b994a2b588a317dbe SHA-256: 0730888433fc4447cd6d175d6bbf5005b05facfd44d7372e87756a45a0f38242
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by an ML classifier and contains a large number of embedded links, many pointing to Shopify-hosted PDFs. One URL, 'https://ttraff.cc/pify?keyword=diffusion+occurs+because+group+of+answer+choices', is identified as a malicious redirector. The presence of a link farm suggests an attempt to manipulate search results or distribute further malicious content, potentially as part of a phishing campaign.

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.cc/pify?keyword=diffusion+occurs+because+group+of+answer+choices
    • http://tononibif.momspantrykitchen.com/uploads/1/3/2/7/132740708/f850908a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/mogilefuvazofalinuvaru.pdf
    • https://cdn.shopify.com/s/files/1/0435/3916/9429/files/80461591041.pdf
    • https://cdn.shopify.com/s/files/1/0433/8168/6423/files/xikop.pdf
    • https://cdn.shopify.com/s/files/1/0434/2031/9893/files/27797257693.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/47970694630.pdf
    • https://cdn.shopify.com/s/files/1/0462/7198/7861/files/18231261586.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1782/files/43938446524.pdf
    • https://cdn.shopify.com/s/files/1/0436/2554/5890/files/rubomenibu.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_off00006208.bin
ea9072e7e6994fc6089784f34c941f00907928054c64b19c3e531109ebb971b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6208 5476 bytes
font_01_sfnt_off000074b4.bin
8bb12b1f342583bf2efdd5cde4fcd22005131e660fb932f220bbfe6dd2be6e36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B4 10112 bytes

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