Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e1cf4e713254e0a…

MALICIOUS

PDF

53.5 KB Created: 2020-08-07 05:25:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03aa0adb2017d42cad72849a13c6da95 SHA-1: 133081aa815b197151d65184f864a8fe80a7b0f5 SHA-256: 8e1cf4e713254e0a80da262c3dff1df01bdd975dc28e4244659202aa839789af
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=speak+your+mind+1+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. The embedded document body text is heavily obfuscated but contains the malicious URL, reinforcing the redirector finding.

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=speak+your+mind+1+pdf
    • http://gekutedo.villatamerza.com/uploads/1/3/1/4/131453133/b4dabb.pdf
    • http://files.furrypeoplepetsitting.com/uploads/1/3/1/0/131069763/9274357.pdf
    • http://rumiviv.understandingwhowewere.com/uploads/1/3/1/4/131453540/tilinafiwud-pivisaxemoji-jolujako.pdf
    • https://cdn.shopify.com/s/files/1/0428/2528/5798/files/wufupegaluvivoxafu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7631/2471/files/89279731976.pdf
    • https://cdn.shopify.com/s/files/1/0437/6743/1320/files/10879088046.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1559/files/w9_printable.pdf
    • https://cdn.shopify.com/s/files/1/0429/8086/8255/files/fifulorafusezit.pdf
    • https://cdn.shopify.com/s/files/1/0437/5507/7790/files/vosilibugawij.pdf
    • https://cdn.shopify.com/s/files/1/0434/6832/5029/files/lateralodef.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5108/files/wafamaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/56008927853.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_off00009483.bin
e638ff76cd474fcb3557082b6669102fc8568271d9caddb14498527870a1a5aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9483 5296 bytes
font_01_sfnt_off0000a689.bin
5aa3da2016796af8ea7823da2c09762b4661c40ca819461a691a29dbdf905fdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA689 10156 bytes

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