Malicious PDF — malware analysis report

Static analysis result for SHA-256 c88991c7f3cd2626…

MALICIOUS

PDF

47.4 KB Created: 2020-08-05 13:33:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 018ef5b691fa8d0ef0bb8e26c6c237ea SHA-1: f17520b9f50e4aa748b50370400e1914f1a35abd SHA-256: c88991c7f3cd26268305a52c328d11e46a67194b066104999531aa94605ac5ae
150 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a redirector service known to host malicious content. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=rational+numbers+class+8+test+pdf', indicating a lure to a potentially harmful site. The presence of a link farm and a critical redirector link firing strongly suggests a phishing or malware distribution attempt.

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=rational+numbers+class+8+test+pdf
    • http://files.citizensforcivicrenewal.org/uploads/1/3/1/4/131453006/zirur.pdf
    • http://files.massagemattersbynancy.com/uploads/1/3/2/6/132681033/9160655.pdf
    • http://files.choctawsummerlearning.org/uploads/1/3/1/4/131409009/ladotepometawepu.pdf
    • http://files.northenddeli.com/uploads/1/3/1/3/131384400/45095487028cd1.pdf
    • http://gixisa.mainelymama.com/uploads/1/3/0/7/130776407/1914841.pdf
    • https://cdn.shopify.com/s/files/1/0433/0163/4213/files/pitubojorariwimej.pdf
    • https://cdn.shopify.com/s/files/1/0431/6676/1120/files/76612423567.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vebamuwonodivori.pdf
    • https://cdn.shopify.com/s/files/1/0435/1760/8090/files/57991081845.pdf
    • https://cdn.shopify.com/s/files/1/0433/1149/7366/files/tijen.pdf
    • https://cdn.shopify.com/s/files/1/0435/4283/9455/files/hammerfell_elder_scrolls.pdf
    • https://cdn.shopify.com/s/files/1/0435/2468/5976/files/warowoboderelitufogupo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9515/3058/files/52625969779.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/xivefore.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1557/files/popefol.pdf
    • https://cdn.shopify.com/s/files/1/0430/3932/6365/files/jerujofigojojisisup.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5108/files/bash_loop_through_files.pdf
    • https://cdn.shopify.com/s/files/1/0429/2601/4620/files/45468364708.pdf
    • https://cdn.shopify.com/s/files/1/0429/7107/0617/files/79799720066.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_off0000646a.bin
6fbc2b084a65e97d62615331a2d2acb72fc778b5cc2890b3446d885651b63cf1
pdf-font-stream PDF embedded font (sfnt) at offset 0x646A 5640 bytes
font_01_sfnt_off0000777e.bin
d9f8f16d23b3c97548107171fb812673ccaddf8922b96be7014636e7d25371c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x777E 10364 bytes
font_02_sfnt_off00009ae2.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9AE2 16164 bytes