Malicious PDF — malware analysis report

Static analysis result for SHA-256 50b3d7a41a710a6c…

MALICIOUS

PDF

49.1 KB Created: 2020-08-06 21:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42a54b491c8758d85f204f1508e92585 SHA-1: 791a0d63046a00e5e249ca7b60d48a85e8123777 SHA-256: 50b3d7a41a710a6c2be3ce845b73f747f07b1c32f4eda3397a5ceb4e51dfa177
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=acrylic+acid+production+pdf', suggesting a lure related to 'acrylic acid production' to entice clicks. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy. No scripts were extracted from this sample.

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=acrylic+acid+production+pdf
    • http://files.calpars.com/uploads/1/3/2/3/132303229/waveluled_mumube.pdf
    • http://files.vanhighschoolbulldogs.com/uploads/1/3/2/6/132682819/tojipudegalo-xenigaf.pdf
    • http://files.alondraparkchessclub.com/uploads/1/3/0/7/130738984/likoki.pdf
    • https://cdn.shopify.com/s/files/1/0432/2813/5592/files/98288571740.pdf
    • https://cdn.shopify.com/s/files/1/0433/4711/6197/files/navabowobodotivafek.pdf
    • https://cdn.shopify.com/s/files/1/0447/8933/4177/files/perspectiva_caballera_paso_a_paso.pdf
    • https://cdn.shopify.com/s/files/1/0433/6694/0828/files/62964606510.pdf
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/77694104629.pdf
    • https://cdn.shopify.com/s/files/1/0439/3120/5787/files/brush_lettering_made_simple_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0433/5425/9606/files/tezukikopiwosoluxin.pdf
    • https://cdn.shopify.com/s/files/1/0436/5503/7093/files/1721532250.pdf
    • https://cdn.shopify.com/s/files/1/0434/7179/8436/files/faxavazijipi.pdf
    • https://cdn.shopify.com/s/files/1/0439/7151/0430/files/segon.pdf
    • https://cdn.shopify.com/s/files/1/0431/1253/0081/files/10173575935.pdf
    • https://cdn.shopify.com/s/files/1/0431/2144/2977/files/beginners_guitar_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/9157/4430/files/52046934401.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_off000075b1.bin
f2c0d66486bd8ece36ac6b81eb9f176b7fc804798d4317944bbffd8a3cac78fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75B1 5064 bytes
font_01_sfnt_off00008707.bin
4164b01cbdcf04b41ad68fd9abebcedfb4317b19e9e8db299c4e074a26c2cac0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8707 15404 bytes

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