Malicious PDF — malware analysis report

Static analysis result for SHA-256 fedc17302cc12c29…

MALICIOUS

PDF

58.8 KB Created: 2020-08-11 05:25:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b70d13a8633690657877352b09c70309 SHA-1: 005dc56772b2384970aa8916d69bbcf1dd3c97d6 SHA-256: fedc17302cc12c2911dfaae400f03adc0b58cadead0894ee5d48f62ab4ba57e4
150 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 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be luring users to a malicious site via the embedded link, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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=manualidades+con+reciclado+pdf
    • http://files.sweetsavannahs.com/uploads/1/3/2/7/132712323/lalujopet_lujaj_ranunuzafijuje_lezig.pdf
    • http://files.joerussellphotos.com/uploads/1/3/1/6/131637374/5649061.pdf
    • http://files.hutchingsfraktur.com/uploads/1/3/1/3/131382595/2731127.pdf
    • https://cdn.shopify.com/s/files/1/0427/8291/6767/files/kevimerobo.pdf
    • https://cdn.shopify.com/s/files/1/0436/8728/0790/files/fiwarubalewebifode.pdf
    • https://cdn.shopify.com/s/files/1/0436/1905/7822/files/62653414101.pdf
    • https://cdn.shopify.com/s/files/1/0429/3751/6191/files/acinetobacter_baumannii_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0433/0304/3230/files/91920992303.pdf
    • https://cdn.shopify.com/s/files/1/0435/7298/6015/files/28634356913.pdf
    • https://cdn.shopify.com/s/files/1/0435/4749/2506/files/kedikitiliwajapuxagobebe.pdf
    • https://cdn.shopify.com/s/files/1/0443/6351/4012/files/convert_long_to_string_java.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32377204601.pdf
    • https://cdn.shopify.com/s/files/1/0440/1148/7397/files/custom_order_maid_3d_2_dlc.pdf
    • https://cdn.shopify.com/s/files/1/0434/0337/8839/files/56663611543.pdf
    • https://cdn.shopify.com/s/files/1/0440/3914/3574/files/mawolutosatis.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_off0000a6f0.bin
f15b99a5b7811a9df0d1ae1db1a9fb1e5a61ccd7b5cbf6f95e4f877a3b293937		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6F0 5156 bytes
font_01_sfnt_off0000b885.bin
b9b371e7b94b14d09e8767875398678a2e87eb3509c9cf3e9c23b2d889afa802		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB885 11048 bytes

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