Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e9fd24e3d82f5a8…

MALICIOUS

PDF

90.8 KB Created: 2020-08-14 04:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d89a8a68d28190f6362b0649210ab5a SHA-1: 38f791511810fc4c262e505d645eae6a63626706 SHA-256: 7e9fd24e3d82f5a8962c7ebb438acdea87e66fcf73e788205d81b34c136bd885
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The ML classifier also flagged the document as malicious. The presence of numerous external links suggests a link farm or redirection strategy to deliver a payload or phish users. The document body is heavily obfuscated and contains what appears to be a reconstructed URL, further supporting the redirection attempt.

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=sample+base64+pdf+string
    • http://xikubulas.jhwolfanger.com/uploads/1/3/0/8/130814397/c5b7acd5036cf4.pdf
    • http://files.werbrave.com/uploads/1/3/2/7/132740482/sokatonujitew_xepixerir_vewanasujun_lulovanexeg.pdf
    • http://wikevese.conversationcompass.com/uploads/1/3/1/8/131871453/f8d49dc86c.pdf
    • https://cdn.shopify.com/s/files/1/0439/7950/5822/files/gubupadogimojikin.pdf
    • https://cdn.shopify.com/s/files/1/0433/4170/9462/files/fumirosuwadositarovaxitid.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/what_does_thaumiel_mean.pdf
    • https://cdn.shopify.com/s/files/1/0429/7555/9829/files/tugimudumufulajoje.pdf
    • https://cdn.shopify.com/s/files/1/0431/3877/7249/files/jinimamiris.pdf
    • https://cdn.shopify.com/s/files/1/0434/0183/8757/files/57931780834.pdf
    • https://cdn.shopify.com/s/files/1/0430/4830/4797/files/wolivalakup.pdf
    • https://cdn.shopify.com/s/files/1/0437/7876/9045/files/tuzupujexawumigemeza.pdf
    • https://cdn.shopify.com/s/files/1/0433/9594/0503/files/picsart_for_pc_free_offline_installer.pdf
    • https://cdn.shopify.com/s/files/1/0430/8559/4775/files/kifiluvafikivokanufujip.pdf
    • https://cdn.shopify.com/s/files/1/0429/6320/6307/files/suzefigodamojen.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/bioreactors_for_animal_cell_culture.pdf
    • https://cdn.shopify.com/s/files/1/0435/8130/9083/files/madixoridewewevutaruw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d01.bin
140c5543526cf9c0802a5c44023114e80a04989a051e890c20f66b4989837009		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D01 5848 bytes
font_01_sfnt_off000120d1.bin
1640b3abeba9bd3987d6d6946a10aad7a84ae612b553342f3fab15addf972e5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120D1 11728 bytes
font_02_sfnt_off000148e6.bin
dcae218017b781ec4876753941bab0284544d25835519c452869eb0f1bbdafc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x148E6 16100 bytes

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