Malicious PDF — malware analysis report

Static analysis result for SHA-256 e090e292674dd460…

MALICIOUS

PDF

45.3 KB Created: 2020-09-08 23:48:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00d7c2742051ff8c6dcd47ec236145eb SHA-1: 123326373a5aa811ad6ecc0120d2b9ea068589b4 SHA-256: e090e292674dd460d3b75712eee9f8c74b9e3a3d98e1f415489cac8e11f2c60a
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/pify?keyword=umbrella+academy+ost'. This indicates an attempt to direct users to malicious infrastructure, likely for further exploitation or credential harvesting. The presence of a large number of external PDF links, many pointing to benign content, suggests a link farm technique to improve SEO for the malicious URL. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact lure.

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.me/pify?keyword=umbrella+academy+ost
    • https://static.usrfiles.com/ugd/954c8b_512be507c6a447e18bde570e860081fb.pdf
    • https://static.usrfiles.com/ugd/3283b0_2fa5416dfe6b4f33a816ea4a4d58c1fc.pdf
    • https://static.usrfiles.com/ugd/47e66e_945b85cfb3ed453d9ab70324f1ef2424.pdf
    • https://static.usrfiles.com/ugd/38eac1_7c7bf411fadd458b99026dc7c7ed0038.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9acc0b0a0f4400c95413b4d3c671cf6.pdf
    • https://cdn.shopify.com/s/files/1/0438/9168/7579/files/mp4_movies_2018_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/8683/0998/files/everfi_venture_quiz_3_answers_quizlet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5788/0994/files/rimedapofajutodulaxatimu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1987/8048/files/57314723259.pdf
    • https://cdn.shopify.com/s/files/1/0434/8005/5965/files/resume_template_word_modern_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/3081/4626/files/71581783285.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_off0000736d.bin
6370fea8351c57f9b6ee07b14c23dac2181bafb0650bbee31c5b13262638b5a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x736D 5316 bytes
font_01_sfnt_off00008566.bin
1eac1226ad461f7ea403815e62095a36239b71c32eaea9e0dce9875cf3b43cd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8566 10396 bytes

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