Malicious PDF — malware analysis report

Static analysis result for SHA-256 3842077b82ced206…

MALICIOUS

PDF

42.5 KB Created: 2020-08-13 21:40:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be954ae24eb1dd6a19882869b2d95cb4 SHA-1: 3d014cee9bcc8fb6030bdcac778ff58abbc23186 SHA-256: 3842077b82ced2068e497175c3f788063fec74a4b11230f452813fbf05ef151a
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific redirector URL that is flagged as malicious. The document body, though obfuscated, contains the same malicious URL. This indicates the primary goal is to redirect the user to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted from this sample.

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.cc/pify?keyword=debussy+arabesque+no+1+sheet+music+piano
    • http://mareg.healthytastylifestyle.com/uploads/1/3/0/7/130776031/wetaxi.pdf
    • http://paruvexe.sttammanywoodworkersguild.com/uploads/1/3/0/8/130874359/busotojevagesof.pdf
    • http://files.flickcoaching.com/uploads/1/3/1/1/131163736/70758.pdf
    • http://wumagikuk.littlesunshinedaycaremn.com/uploads/1/3/0/9/130969754/4ba476.pdf
    • http://files.brushandbranch.co/uploads/1/3/0/7/130740344/2297158.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/84389653827.pdf
    • https://cdn.shopify.com/s/files/1/0434/5610/2565/files/1052962690.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2797/files/zolasekowoliligaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9488/files/89358424046.pdf
    • https://cdn.shopify.com/s/files/1/0434/6563/8050/files/94537329510.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6970/files/wover.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zipepatijexozuzazes.pdf
    • https://cdn.shopify.com/s/files/1/0432/2862/7099/files/zonirepotir.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8628/files/92210512865.pdf
    • https://cdn.shopify.com/s/files/1/0435/2737/2964/files/dofisujuwamorexex.pdf
    • https://cdn.shopify.com/s/files/1/0436/7931/8166/files/beginner_placement_test.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c85.bin
166899995459a499b59ddef0291f43db8086f442d75a4f9a8829ac7c933d96cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C85 5560 bytes
font_01_sfnt_off00005f4b.bin
17fd0e10ee3aa7f59727c78978398974abb69688be02a17815a52402f31e5533		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4B 11884 bytes
font_02_sfnt_off00008793.bin
61761e6c71fdd980502ce8a3a8cbf9590216241eb9eabe72fdf309a1c23cd3c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8793 16096 bytes

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