Malicious PDF — malware analysis report

Static analysis result for SHA-256 efd2276a71ecdac7…

MALICIOUS

PDF

305.9 KB Created: 2020-08-28 06:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef241c9d7b381cfa5ec1b75f91832026 SHA-1: 8069945589ca258b3bdbb020920e779b34e71317 SHA-256: efd2276a71ecdac754cfe30bcf0a599d2be7b223161916abfd7ce4c0370f787d
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=foster+the+coquette'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL. This indicates the primary function of the PDF is to redirect the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • 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.
  • 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=foster+the+coquette
    • http://files.markjacobsauthor.com/uploads/1/3/0/7/130776089/xoboremanufux_nowinojuwunote_kipabitolijosem.pdf
    • http://files.akademosresearch.com/uploads/1/3/0/7/130739918/nuwesi.pdf
    • http://files.ehrynska.com/uploads/1/3/0/7/130738889/a398bb.pdf
    • https://cdn.shopify.com/s/files/1/0431/9186/1412/files/46646819893.pdf
    • https://cdn.shopify.com/s/files/1/0427/7331/5740/files/nilalapumidepepelar.pdf
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/zogemazojap.pdf
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/cae_gold_exam_maximiser.pdf
    • https://cdn.shopify.com/s/files/1/0434/2359/6711/files/66568941949.pdf
    • https://cdn.shopify.com/s/files/1/0437/3459/7784/files/cartoon_game_free.pdf
    • https://cdn.shopify.com/s/files/1/0452/2039/7216/files/66829930085.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/646255477.pdf
    • https://cdn.shopify.com/s/files/1/0463/6960/3739/files/elementary_information_security_2nd.pdf
    • https://cdn.shopify.com/s/files/1/0433/9420/3815/files/avd_manager_not_showing_in_android_studio.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00048598.bin
a6dd13ea7f6f60732ca3830546f801c3e282fd72a24121d4607c34fe33225d0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48598 4724 bytes
font_01_sfnt_off000495aa.bin
00d3000901bbeeed1049d9d972bdb4273ce69e22e0baef4a9a894c73a0e756b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x495AA 10592 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.