Malicious PDF — malware analysis report

Static analysis result for SHA-256 76e7dddadb79f8ff…

MALICIOUS

PDF

67.4 KB Created: 2020-07-30 18:33:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7996c365cf50fb2c60192411235ef167 SHA-1: dc1858e99207dd22b6d06e8e157cc014a2f44de0 SHA-256: 76e7dddadb79f8ff866211905e9b8b7ee03b65ba445250405d3785e5839a235d
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to ttraff.cc. Another critical heuristic, PDF_SEO_LINK_FARM, indicates a large number of links were embedded, likely for SEO manipulation or to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of malicious redirector links suggests an attempt to lead users to harmful sites.

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=angkor+temple+guide+pdf
    • http://files.kentuckymathcounts.org/uploads/1/3/1/8/131872037/9914713.pdf
    • http://files.connorshillgospelhall.com/uploads/1/3/1/3/131380771/navefuribeduzin.pdf
    • http://files.midatlanticbrassbandfestival.com/uploads/1/3/0/7/130775557/230140.pdf
    • http://files.profesionallashes.com/uploads/1/3/0/7/130738876/kewosako.pdf
    • http://files.changedbythomas.com/uploads/1/3/2/8/132814906/pejonal-bezixazatol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rabilividobakomitunaxizug.pdf
    • https://cdn.shopify.com/s/files/1/0428/1237/5207/files/48103845273.pdf
    • https://cdn.shopify.com/s/files/1/0433/3027/3448/files/kilupijolibulegoged.pdf
    • https://cdn.shopify.com/s/files/1/0435/4523/1509/files/bemizeko.pdf
    • https://cdn.shopify.com/s/files/1/0438/4935/1328/files/nowutajiviganutum.pdf
    • https://cdn.shopify.com/s/files/1/0432/3767/1075/files/zirogawe.pdf
    • https://cdn.shopify.com/s/files/1/0436/4537/0518/files/16881523835.pdf
    • https://cdn.shopify.com/s/files/1/0432/2285/9944/files/99363732415.pdf
    • https://cdn.shopify.com/s/files/1/0430/9578/5629/files/tapufupeko.pdf
    • https://cdn.shopify.com/s/files/1/0428/8125/3535/files/14479616331.pdf
    • https://cdn.shopify.com/s/files/1/0435/1698/5503/files/manosuwexepikagomexibo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1567/5809/files/71907650899.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ac65.bin
94aa5d98ecaf3d319c527a173ef56cfddb30177a94bf65705c03c41f0d758840		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC65 4908 bytes
font_01_sfnt_off0000bcf9.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCF9 1800 bytes
font_02_sfnt_off0000c587.bin
2d25aab51080520af2e4f1dc39b57b6f24ff9c7bac1dd2e21a1577707bf8c029		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC587 10604 bytes
font_03_sfnt_off0000e9c6.bin
aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C6 16312 bytes

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