Malicious PDF — malware analysis report

Static analysis result for SHA-256 928345a1e41e327c…

MALICIOUS

PDF

53.4 KB Created: 2020-08-31 04:11:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a02c3ff073940e12a2c2463090604dd0 SHA-1: 6b1a3acf94a8b14e78d7fe0392a4459ef6019cfa SHA-256: 928345a1e41e327c30aef001a37871be43a5b2aea213b14c1bcaa46f8942a822
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=how+tall+is+cole+sprouse'. This indicates a phishing or social engineering attempt to redirect the user to a malicious site. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The presence of a PDF link farm heuristic further suggests this document is part of a larger campaign to distribute malicious content.

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/wix?keyword=how+tall+is+cole+sprouse
    • https://static.usrfiles.com/ugd/b65acf_6aef9784cc7a4767aa448ec1760f0458.pdf
    • https://static.usrfiles.com/ugd/e33828_ef2b791f5f9c44799d235920b36f4084.pdf
    • https://static.usrfiles.com/ugd/b8c837_ba607913a8904a358d37d38dc01a3227.pdf
    • https://static.usrfiles.com/ugd/b8c837_e8a828d5db344b34b4a16364c9714aa7.pdf
    • https://static.usrfiles.com/ugd/fb83f1_76fb0b6ee4284f9f997a95d08abd1c83.pdf
    • https://static.usrfiles.com/ugd/5be868_cae382f7c4e2429fa5f81c9800f8131c.pdf
    • https://cdn.shopify.com/s/files/1/0431/6125/6096/files/28245873175.pdf
    • https://cdn.shopify.com/s/files/1/0431/5165/5076/files/elementary_differential_equations_and_boundary.pdf
    • https://cdn.shopify.com/s/files/1/0440/1673/0277/files/nioh_les_yeux_de_la_reine.pdf
    • https://cdn.shopify.com/s/files/1/0430/9418/0001/files/blanco_brown_the_git_up_free.pdf
    • https://static.usrfiles.com/ugd/6350c7_01ba4fc993ff4790a3083dfac19eeb69.pdf
    • https://static.usrfiles.com/ugd/f967ac_0317a8a40e554b4c99db8b800d7ef68d.pdf
    • https://static.usrfiles.com/ugd/3e87bf_bfc28eaad0634a059d9078ae70751426.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_off00009414.bin
03578ec18959ab5ca9c6d5e4a27ebd69b895cf8a3b44a53db60c5ad1644d12ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9414 4980 bytes
font_01_sfnt_off0000a524.bin
9ae9fd888c641961e56625fa490df1a7d207287dee857212b1279e78fdf0d058		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA524 10572 bytes

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