Malicious PDF — malware analysis report

Static analysis result for SHA-256 96e1f4431e38650b…

MALICIOUS

PDF

49.7 KB Created: 2020-08-29 17:22:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6e1e74dd9fa0de6c67bdbf1e9955bfc SHA-1: 1503258d67d09a7034bb8adaf5460e17023a0028 SHA-256: 96e1f4431e38650bbc9e0cd7b22f928b4e9e3adadcd3c2bc36608d3ad7584d56
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Addends T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to external resources, indicating a link farm or redirection strategy. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/wix?keyword=el+poder+del+esposo+que+ora+libro'. The ML classifier also strongly flagged this PDF as malicious. The presence of numerous Shopify links suggests an attempt to disguise the malicious redirector among seemingly benign content.

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/wix?keyword=el+poder+del+esposo+que+ora+libro
    • https://cdn.shopify.com/s/files/1/0431/2586/6662/files/batman_vs_superman_2020_script.pdf
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/jajinaduxa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0314/9462/files/kujonejisejesedunufusez.pdf
    • https://cdn.shopify.com/s/files/1/0440/6332/6358/files/99174698064.pdf
    • https://cdn.shopify.com/s/files/1/0434/4207/7852/files/83116435306.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9908973296.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7269/files/sri_rudram_chamakam.pdf
    • https://static.usrfiles.com/ugd/b8c837_d875d13cd1e6451d9ac5728e0dbfcc71.pdf
    • https://static.usrfiles.com/ugd/b8c837_0d1145e8a3264e6b93c0dce3e7f1780e.pdf
    • https://static.usrfiles.com/ugd/b8c837_03a38d3ee55f42c0881c854eeebf817f.pdf
    • https://static.usrfiles.com/ugd/b8c837_24a2109d6d6a4ef2a82f3fb2642d547c.pdf
    • https://static.usrfiles.com/ugd/b8c837_6095cd605a4b43bca7bb6f59728d8c0f.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b8472b5931f4c70b0af256d32544c98.pdf
    • https://static.usrfiles.com/ugd/b8c837_abd7ae0231f74153a4cf2db03d9db9d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0d9ea0f57004c04b51958ec8cf844ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_eebae45992ab439ba4e4491924dd2d86.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_off00005ea7.bin
071947f52070909c3312a64c4f35b21df2a74b55a9889e76317c6b7285364917		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA7 5176 bytes
font_01_sfnt_off0000703f.bin
065feb814008284d94917c38f2a14df48dcae1e90c75825bc9042f3946b82901		 pdf-font-stream PDF embedded font (sfnt) at offset 0x703F 4468 bytes
font_02_sfnt_off00007c34.bin
cc90c7469b9c3fcaa76e0ebe57ef3e699a7496a745d26b74f113063eea4ae014		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C34 11644 bytes
font_03_sfnt_off0000a247.bin
86366f63aa1e5c97d12fb33b88153480a9e9ed0cce5fa32e227efc0e587603e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA247 16240 bytes

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