Malicious PDF — malware analysis report

Static analysis result for SHA-256 b274f44fdacdeb26…

MALICIOUS

PDF

37.4 KB Created: 2020-08-17 13:33:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0bc223df2684204ed4c2bcd4456e2e8 SHA-1: 7f93cbf00b55ba1bcb7e89b511d17823b54a7c84 SHA-256: b274f44fdacdeb263de4b60fefa3580dd73fdde21f1e31e624258a69af639fd1
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one heuristic specifically identifying a link to a known malicious redirector (ttraff.com). The document body, though heavily obfuscated, contains the same URL. The presence of numerous links, including to a potentially malicious redirector, suggests a phishing or scam attempt designed to lead the user to a malicious site.

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.com/pify?keyword=animated+images+of+thank+you
    • http://zasalexa.little-childrens-bible-school.com/uploads/1/3/0/9/130969352/f2985cb946e630.pdf
    • https://cdn.shopify.com/s/files/1/0437/7467/3057/files/dubawopinotejozejizefop.pdf
    • https://cdn.shopify.com/s/files/1/0432/4022/6984/files/sufivimibedumaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/0675/4970/files/ergonomics_standards.pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7017/files/xitemiposiwifasij.pdf
    • https://cdn.shopify.com/s/files/1/0433/5858/4986/files/lubanupoxilixikemiwovurex.pdf
    • https://cdn.shopify.com/s/files/1/0431/1705/2066/files/dotiraduseva.pdf
    • https://cdn.shopify.com/s/files/1/0433/1179/2286/files/38871864036.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/rogujob.pdf
    • https://cdn.shopify.com/s/files/1/0438/8565/8280/files/10923953063.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_off00005529.bin
bd76c3cfac252d8064909a2bc1be0e68f46179783016086eb5321223f103bf87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5529 5348 bytes
font_01_sfnt_off00006734.bin
74dcc9b1fc5786bcdaacb093f79bf86d83335f411f17b1630e259475182f64e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6734 10016 bytes

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