Malicious PDF — malware analysis report

Static analysis result for SHA-256 727d22f576476a48…

MALICIOUS

PDF

46.6 KB Created: 2020-08-09 08:33:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a9877c8b7aa32181a4a26a9e6f613b7 SHA-1: cd61c163a332237e442bcf1958f9e3e0da751357 SHA-256: 727d22f576476a481a19147c9eb3d4ee6c3593a718b8282955cd416becb5b410
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a lure for an 'NDA agreement template' to trick users into clicking the malicious URL. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=nda+agreement+template+pdf
    • http://files.monitzvocalstudio.com/uploads/1/3/0/7/130740065/kopanusasizer-rovudiburuxi-zikifove.pdf
    • http://dabakub.performancevistas.org/uploads/1/3/2/6/132681409/vowerenakep.pdf
    • http://files.yorktowngirlscouts.org/uploads/1/3/1/0/131070483/gitibikir_bukugiraxevafo_kudajomafipumo.pdf
    • http://bikebus.toddbennethum.com/uploads/1/3/1/6/131606165/kezoxowolarula.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9076/3175/files/51855177476.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3250/files/wuxit.pdf
    • https://cdn.shopify.com/s/files/1/0428/1666/7814/files/tibusojudozagufaboro.pdf
    • https://cdn.shopify.com/s/files/1/0434/2602/1527/files/nubenefibisi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/zijasod.pdf
    • https://cdn.shopify.com/s/files/1/0433/7221/6483/files/appsc_group_1_syllabus_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/zexusexesugepana.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/53409929289.pdf
    • https://cdn.shopify.com/s/files/1/0435/1292/2264/files/zuromuviw.pdf
    • https://cdn.shopify.com/s/files/1/0434/1065/3338/files/sidetukud.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16494210232.pdf
    • https://cdn.shopify.com/s/files/1/0432/7840/1700/files/55050361499.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_off0000788e.bin
5436ab7ac051e2f23ad9081422bf5a95d3392c8c1ec823ef1bf48be2f57ad450
pdf-font-stream PDF embedded font (sfnt) at offset 0x788E 5152 bytes
font_01_sfnt_off00008a07.bin
318ec9814b0c851df03793df1ba766e926ffbbac9c8ad50664764eeeb5900f93
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A07 10396 bytes