Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4741d35a48aafee…

MALICIOUS

PDF

33.6 KB Created: 2020-08-30 11:44:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00962f2772cf9274bc14264c66119368 SHA-1: e5a7840e10790e3b828f2ed1710e0f1897b0480d SHA-256: f4741d35a48aafee03e648c0a60b12d482ef6d118fa719af06433d933cfe9a51
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.cc/wix?keyword=catalogo+nacional+de+costos+2017'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the URL and text suggesting a lure related to a 'Catalogo nacional de costos 2017'. The primary attack pattern involves redirecting the user to a malicious site, likely for phishing or to download further payloads.

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=catalogo+nacional+de+costos+2017
    • https://cdn.shopify.com/s/files/1/0431/8678/2369/files/newerazo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2391/7478/files/jirekebemovegemeke.pdf
    • https://cdn.shopify.com/s/files/1/0432/1624/0807/files/wrong_side_of_heaven_tab.pdf
    • https://cdn.shopify.com/s/files/1/0434/1887/8114/files/reddit_how_to_unhide.pdf
    • https://static.usrfiles.com/ugd/b8c837_5746a26cc9f74eae8e1b5bb451138be4.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad69ca6c5edb4a7694b201c92672dd7f.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0d9ea0f57004c04b51958ec8cf844ae.pdf
    • https://static.usrfiles.com/ugd/76b6de_43aa4133b0da46fab2c90c76142dfdc1.pdf
    • https://static.usrfiles.com/ugd/f4de5e_8bc7849e71974d3eb903aafaadec2ed0.pdf
    • https://cdn.shopify.com/s/files/1/0433/9790/6589/files/takekozunam.pdf
    • https://cdn.shopify.com/s/files/1/0434/4158/6332/files/poxegunovepew.pdf
    • https://cdn.shopify.com/s/files/1/0432/8462/7616/files/runekiju.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_off000042cd.bin
e388cd6595112d55e34e67e3b860289f9d51944a70b722c41e156ac50f81af40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42CD 5320 bytes
font_01_sfnt_off00005505.bin
d4d348db85864096e6fb3c17bd30cccf34d4ec1f8640997cc2784878a433b4a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5505 10712 bytes

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