Malicious PDF — malware analysis report

Static analysis result for SHA-256 880381b78bd05768…

MALICIOUS

PDF

66.0 KB Created: 2020-08-08 00:13:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8927b72841da535f97d8090f0cf04365 SHA-1: 2a9278337538859e9a633769db6cb8335ddd1b55 SHA-256: 880381b78bd057687294783da1cd4cfdf03b3fb2855c0c0bd6ac2ddf543165e3
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=statistics+cdf+and+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The file also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the malicious URL and references to statistics and PDFs, likely as a lure.

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/pify?keyword=statistics+cdf+and+pdf
    • http://files.jungersohn.com/uploads/1/3/0/7/130739699/nelusen.pdf
    • http://pepat.kennebecasispaddlingcentre.com/uploads/1/3/2/3/132303374/cfbdd5049fb9ea8.pdf
    • http://files.ivyleaguenursery.com/uploads/1/3/1/4/131407698/5675274.pdf
    • http://files.kvarner-holiday.com/uploads/1/3/1/1/131164275/1780521.pdf
    • http://files.jjeffreymesserole.com/uploads/1/3/1/3/131384018/f3faf9c41e.pdf
    • https://cdn.shopify.com/s/files/1/0434/7451/8180/files/35787687855.pdf
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/autocad_3d_drawing_practice.pdf
    • https://cdn.shopify.com/s/files/1/0429/1035/1513/files/fupujugodazewinadogetiv.pdf
    • https://cdn.shopify.com/s/files/1/0435/5548/7905/files/carbapenemicos_y_monobactamicos.pdf
    • https://cdn.shopify.com/s/files/1/0428/5261/4311/files/36659485747.pdf
    • https://cdn.shopify.com/s/files/1/0434/4279/8757/files/18397770853.pdf
    • https://cdn.shopify.com/s/files/1/0437/2103/1832/files/xaxowijutefodeserux.pdf
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/kedijo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3210/1543/files/97677715485.pdf
    • https://cdn.shopify.com/s/files/1/0429/2762/0249/files/13009020653.pdf
    • https://cdn.shopify.com/s/files/1/0428/7175/0823/files/23505030651.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a300.bin
3b7cacd72e1b3dd8eda9f2232909b7403ce6e0de84ade1f621fb46764345786a
pdf-font-stream PDF embedded font (sfnt) at offset 0xA300 5124 bytes
font_01_sfnt_off0000b487.bin
d973f1f648064fe71435a0c32658a5db2f1c6ce54402a44274308eddb219353f
pdf-font-stream PDF embedded font (sfnt) at offset 0xB487 15604 bytes
font_02_sfnt_off0000e5a0.bin
f3fc314fb354192e76360cd123b7d9a03d3dc8559c8ea51a6bdd4cbb7575671d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A0 16220 bytes