Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef2a9b2f80f744f7…

MALICIOUS

PDF

51.3 KB Created: 2020-08-02 18:14:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d64bbecb68b3ee23819b1a6bdf5984d4 SHA-1: a24d5592efd52a8951842ee9fb01f0e651e318b4 SHA-256: ef2a9b2f80f744f70c876cd976b3efa54654abe13f847024cbdcc9bc493ea2f6
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify-hosted PDFs. The primary malicious URL, https://ttraff.com/pify?keyword=how+to+change+font+on+discord, is a known malicious redirector. The document body, though heavily obfuscated, contains the same lure and malicious URL, indicating an attempt to drive traffic to malicious infrastructure. The ML classifier strongly supports the malicious verdict.

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=how+to+change+font+on+discord
    • http://files.moniquesartjewelry.com/uploads/1/3/1/6/131607374/jojomateze.pdf
    • http://files.lauraspreciouspomeranians.com/uploads/1/3/1/4/131437233/283bacb.pdf
    • http://files.artfromalice.com/uploads/1/3/1/6/131607062/libojadijuropej.pdf
    • https://cdn.shopify.com/s/files/1/0436/4615/6960/files/mevefinizakexomeponavow.pdf
    • https://cdn.shopify.com/s/files/1/0434/5918/2745/files/jilaganaxudusizavusewi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5501/4297/files/sonixapetibedikajuver.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0441/files/probability_and_statistics_degroot_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0440/3272/1046/files/65160278509.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67331216746.pdf
    • https://cdn.shopify.com/s/files/1/0437/7015/1061/files/sedunebesesirarorujapozix.pdf
    • https://cdn.shopify.com/s/files/1/0433/9964/3286/files/48840750148.pdf
    • https://cdn.shopify.com/s/files/1/0429/7372/4825/files/black_swan_netflix.pdf
    • https://cdn.shopify.com/s/files/1/0431/1888/7073/files/94531077240.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zogubarekerebadopotuleju.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7649/files/mitovuxubit.pdf
    • https://cdn.shopify.com/s/files/1/0432/7525/5972/files/2987987963.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000697b.bin
c5c39229ee52c89c4f871b9958f45186cbcb0e8145e8f12674ee80897badbf0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x697B 5136 bytes
font_01_sfnt_off00007a1b.bin
a9cdeb557d44531506d24d130c858155ab6916542a3cce8a3b9478b9ae7d8ff9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1B 5304 bytes
font_02_sfnt_off00008c37.bin
89403d534634077b7fd7c2b15bab2874f592daa78630347e8975f6b52e22ff45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C37 10412 bytes
font_03_sfnt_off0000afed.bin
a6bf16aa278d6754c794666eeba9f8df8e22ea00f0c694ee54e92b6cb6728372		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFED 6104 bytes

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