Malicious PDF — malware analysis report

Static analysis result for SHA-256 c95cc9ce153bd417…

MALICIOUS

PDF

113.0 KB Created: 2020-09-04 16:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0dc8ed12a0dff81e3f4e025a73748ea3 SHA-1: 12efef13c419075d0f53d517c8924e71f28352bc SHA-256: c95cc9ce153bd4172e7d86e1775a33900fc43decbd9ea5fce13cdd0f6b90e90d
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The embedded URL `https://ttraff.me/wix?keyword=nachiketa+chakraborty+all+songs` is likely the primary mechanism for delivering a malicious payload or leading the user to a phishing page. The document body appears to be heavily obfuscated or corrupted, preventing a more detailed analysis of its specific content or intent beyond the malicious link.

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.me/wix?keyword=nachiketa+chakraborty+all+songs
    • https://cdn.shopify.com/s/files/1/0430/5027/0869/files/gotuxizetizoxurosebev.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3399/files/rumafot.pdf
    • https://cdn.shopify.com/s/files/1/0428/3095/4655/files/badime.pdf
    • https://cdn.shopify.com/s/files/1/0434/5797/0328/files/61155268928.pdf
    • https://cdn.shopify.com/s/files/1/0431/4896/8090/files/vavugokelerebideta.pdf
    • https://static.usrfiles.com/ugd/95089d_c03a0427286a47e9bc9b84c354e8be71.pdf
    • https://static.usrfiles.com/ugd/b8c837_e00a3a6dbe5044e19e79717ded6e2396.pdf
    • https://static.usrfiles.com/ugd/158fb9_4cda603c0c6c472eb38f9f7a8a8aadd1.pdf
    • https://static.usrfiles.com/ugd/cafc24_b4ace4769c944fa0873b0fd707932412.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_05dd983c01104df1bfb59037772e7610.pdf
    • https://static.usrfiles.com/ugd/8a419d_895859d6695f4a618d6d60a50626eb54.pdf
    • https://static.usrfiles.com/ugd/b8c837_7766d10a3d1948df888cf8c94ca6f3d8.pdf
    • https://static.usrfiles.com/ugd/1cc7e8_a18a9502be914f8c8603b6aa216a8aec.pdf
    • https://static.usrfiles.com/ugd/e1d58f_809ed76f729f49b2b4c69ce46a7f6a54.pdf
    • https://static.usrfiles.com/ugd/e948c1_2698cef144c2429fb6f94ba9a0c77419.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_off000176a0.bin
276106a0631be73d3f1fe129a8504bd1aedb29e07bc4dd03b69f039b62ed3dc4
pdf-font-stream PDF embedded font (sfnt) at offset 0x176A0 5336 bytes
font_01_sfnt_off000188d1.bin
d899fed89e23cc169a8ce065d929b45c85cf67779a84d5a3f38e0547d4150e52
pdf-font-stream PDF embedded font (sfnt) at offset 0x188D1 14760 bytes