Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeb26174ef048725…

MALICIOUS

PDF

39.3 KB Created: 2020-08-19 00:40:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c8ee5fc52696f144dd7889a798180a8 SHA-1: b706bdbda34a431dcd39fac0aaecb2b55f0a8bd4 SHA-256: aeb26174ef048725f1e77455b02aea98b23188018ac1d03d0f555fcb8bbf9cf3
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised as a 'data flow diagram ppt template'. This suggests a social engineering lure to direct users to malicious content. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, many of which are hosted on Shopify. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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=data+flow+diagram+ppt+template
    • http://files.bluemoonboutiquejoplin.com/uploads/1/3/1/4/131438323/jusadesudi-nidenekirotu.pdf
    • http://files.burmenlawgroup.com/uploads/1/3/2/6/132682093/gajuse-rurago-zikenategad.pdf
    • http://medipapa.maritimesmallfarms.ca/uploads/1/3/0/8/130814328/fugoguv_junavidapub_kawunizuzuto.pdf
    • https://cdn.shopify.com/s/files/1/0428/7945/1295/files/6312836273.pdf
    • https://cdn.shopify.com/s/files/1/0444/8436/2407/files/retilopazalesa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0409/9740/files/serenity_prayer_in_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/7384988386.pdf
    • https://cdn.shopify.com/s/files/1/0439/6023/8238/files/77304719483.pdf
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/toreb.pdf
    • https://cdn.shopify.com/s/files/1/0437/0196/0854/files/29128568740.pdf
    • https://cdn.shopify.com/s/files/1/0432/7574/7484/files/rovoxowajudotezemubexogo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8567/6192/files/13311806489.pdf
    • https://cdn.shopify.com/s/files/1/0437/3970/9605/files/56833845789.pdf
    • https://cdn.shopify.com/s/files/1/0430/8579/1393/files/milurevenaz.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_off00005c3d.bin
cf3069a45b475d70620680a68f1b0446db4b2c9904bd547ef8877138faaf9fa6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3D 5272 bytes
font_01_sfnt_off00006e38.bin
a36748acb174d7d6f1a1d30b88ba086432ed6b7143f21ee5cb2485f05f34e25b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E38 10056 bytes