Malicious PDF — malware analysis report

Static analysis result for SHA-256 67659e4777d373ce…

MALICIOUS

PDF

42.0 KB Created: 2020-08-16 20:02:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ab1ee6f1477478213f9dfb0167834f0 SHA-1: d0678c985f5c743e38279c957f971176525d7d42 SHA-256: 67659e4777d373ce648254a19a5f95b3fa3d16573211354a1fd8b82fceba3af2
162 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify domains, suggesting an SEO poisoning attempt to drive traffic to malicious or low-quality content. One of the primary links, 'https://ttraff.ru/pify?keyword=software+al+quran+digital', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains similar URLs, reinforcing the link farm and redirection attack pattern. No scripts were extracted, but the presence of numerous links and the malicious redirector indicate a high likelihood of user redirection to malicious sites.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=software+al+quran+digital
    • http://files.theiceridge.com/uploads/1/3/0/7/130775607/wesufanoke-venufakezopuse.pdf
    • http://files.amerifencellc.com/uploads/1/3/1/3/131379054/9098011.pdf
    • http://files.truevibrancy.com/uploads/1/3/1/3/131383838/9fa8ea965e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6150/1336/files/wcirb_class_code_search.pdf
    • https://cdn.shopify.com/s/files/1/0452/4644/7776/files/96992977767.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lozafawofife.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5684/files/benebinufuzuwak.pdf
    • https://cdn.shopify.com/s/files/1/0438/6154/1014/files/vusipagosupi.pdf
    • https://cdn.shopify.com/s/files/1/0440/9131/0232/files/verifica_analisi_logica_seconda_media.pdf
    • https://cdn.shopify.com/s/files/1/0432/8456/2084/files/kepapu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8837/9032/files/9113830302.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_off00006848.bin
d9c2eaec05599a74897ac0b948355ee6b10868682ab0a5ffe6bf439d1399c2c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6848 5220 bytes
font_01_sfnt_off00007a1b.bin
281d036076b437127784361db872cd6baa63f7737dc98c2bdb938a081572784a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1B 9804 bytes

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