Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b96300681779ddf…

MALICIOUS

PDF

67.1 KB Created: 2020-08-30 14:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1a9e8c096597b90f6cf357ee95fd444 SHA-1: 8c6720615a90f3b2f40780c4a15620d8f8fc044a SHA-256: 4b96300681779ddf0ac0effc48b12b294029d4c3e4502850ff129da0ae7078d6
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=historia+de+la+psiquiatria+en+mexico+pdf'. This URL is likely part of a phishing or scam campaign designed to lure users to malicious content. The presence of a large number of external PDF links also suggests a link farm or SEO manipulation tactic. The ML classifier strongly supports the malicious verdict.

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/wix?keyword=historia+de+la+psiquiatria+en+mexico+pdf
    • https://static.usrfiles.com/ugd/c0b427_71e48e0ce554403c9667f61b04a97535.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d874fdff0444ab6a2898bc7ca32f4a5.pdf
    • https://static.usrfiles.com/ugd/c3f88d_60d5fa949ec340d280e74e0154672709.pdf
    • https://static.usrfiles.com/ugd/b910ae_6617f16d274d4c46b233d03ef9bbbdfd.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_c8f7e1f6006147028404a47397843789.pdf
    • https://cdn.shopify.com/s/files/1/0434/4568/2328/files/43403694607.pdf
    • https://static.usrfiles.com/ugd/bb13a2_5678b2e89cd445e6b558e5d7bd264edf.pdf
    • https://static.usrfiles.com/ugd/aef5b7_130dd50196124b6984e13b11c75ed7fe.pdf
    • https://cdn.shopify.com/s/files/1/0438/0845/6865/files/imagine_dragons.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3351/files/livenan.pdf
    • https://cdn.shopify.com/s/files/1/0435/2966/6724/files/josaa_medical_certificate_format.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dosoxuwananeworatimuk.pdf
    • https://cdn.shopify.com/s/files/1/0435/9569/4239/files/xamarin_forms_ios_splash_screen_background_color.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_off0000c8fe.bin
e85de77f055f85e820c5fb3852158cdf3a45bdda55dddd989e1bc7a55973fdf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8FE 5456 bytes
font_01_sfnt_off0000db6f.bin
128f22274b7af58959c3a6cd563fda95e539f17eba3b449ebbda8379a128c913		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6F 11004 bytes

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