Malicious PDF — malware analysis report

Static analysis result for SHA-256 8152d6b16632118d…

MALICIOUS

PDF

38.5 KB Created: 2020-08-17 06:55:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 771ee0068e0e33621bf69de5b1489aea SHA-1: cc14e07fc6bf68b40e4e98d8e54076a8bddf9000 SHA-256: 8152d6b16632118dcae16384df64817f5e625a4305df73a44b6316a502b3bd46
120 Risk Score

Malware Insights

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

The PDF file contains embedded links that lead to a malicious redirector, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains text suggesting it is a worksheet, likely a lure. The primary heuristic indicates a malicious redirector link, and the presence of numerous other PDF links suggests a link farm or SEO poisoning attempt to distribute malicious content. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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=compound+and+complex+sentences+worksheets+ks2
    • http://fofub.purewhiteproductions.com/uploads/1/3/1/3/131383483/4595230.pdf
    • https://cdn.shopify.com/s/files/1/0433/0392/7973/files/75008779189.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/jumixigobulomukugaxuteser.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/44124254843.pdf
    • https://cdn.shopify.com/s/files/1/0438/8562/5499/files/the_righteous_mind_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/1088/9624/files/48427765440.pdf
    • https://cdn.shopify.com/s/files/1/0437/2247/3624/files/42837176244.pdf
    • https://cdn.shopify.com/s/files/1/0429/2355/7030/files/dudeberejamome.pdf
    • https://cdn.shopify.com/s/files/1/0429/6635/2028/files/72239036467.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/tumimadisidanir.pdf
    • https://cdn.shopify.com/s/files/1/0427/9874/3719/files/65393661532.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/6719557071.pdf
    • https://cdn.shopify.com/s/files/1/0434/4964/7261/files/xaxomugadirajodakubux.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_off0000581e.bin
892ba2ec41ea3f6b1bcd2bbf55800b601f0ee4695ad8599641b0ae99f0f66824		 pdf-font-stream PDF embedded font (sfnt) at offset 0x581E 5576 bytes
font_01_sfnt_off00006af5.bin
dd4319bd41925bcf87e4076122f556d4c5d65c1afb3e964083aa61a8ea8a435f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF5 10132 bytes

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