Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c34331f9ed0759…

MALICIOUS

PDF

37.5 KB Created: 2020-08-21 02:02:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdf67b72c6235b3ec849bbb96a99b7b5 SHA-1: 8c59317ac3a282f33b3108cdc62346f40668076c SHA-256: 56c34331f9ed075906cd15d84d3f1c85b3bb1924970cca0f2f34449ead7e1e77
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to 'Google calendar app android sync', suggesting a lure to trick users into clicking the malicious link. The primary malicious URL identified is https://ttraff.com/pify?keyword=google+calendar+app+android+sync, which is likely used to redirect 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=google+calendar+app+android+sync
    • http://bodel.gamechefs.net/uploads/1/3/0/7/130738970/naxaleta_furokorukorov_sanoguf_mosejuful.pdf
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/88316296909.pdf
    • https://cdn.shopify.com/s/files/1/0429/5720/9753/files/bebopekukabexura.pdf
    • https://cdn.shopify.com/s/files/1/0437/6995/4456/files/38480601699.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/646255477.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/dijegini.pdf
    • https://cdn.shopify.com/s/files/1/0437/7542/6721/files/86479750766.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74808095599.pdf
    • https://cdn.shopify.com/s/files/1/0431/1498/7682/files/mewujopamukiziwavunazudos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/magizokoluredofet.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_off000055b9.bin
a708f71fc999ab609cb7dcf73cf49306e6daca5f62b79eef057e08ba6502735b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55B9 5372 bytes
font_01_sfnt_off00006811.bin
1c44912c27a536e51a08f0c3d5f29eb9a81445a01dc1a9a89334eacd61bca1b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6811 9888 bytes

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