Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f95ebb7959555a…

MALICIOUS

PDF

43.5 KB Created: 2020-08-03 21:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64feedb5e9c98aadd8e4d55e8e7360f1 SHA-1: bf869958d6d184790201f0f6f8076100b7f0ddc0 SHA-256: e5f95ebb7959555a198415ffc490056e172922d4eed8bfd183736ce75935506c
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. This URL is presented with a keyword suggesting a lure for educational content. The document also exhibits characteristics of a PDF SEO link farm, embedding numerous links, many of which point to benign Shopify domains but are likely used to inflate search rankings. The primary malicious IOC is the redirector URL, which is designed to lead users to further malicious content.

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=area+of+rectangle+word+problems+pdf
    • http://files.blackicepress.com/uploads/1/3/1/0/131071067/dafut.pdf
    • http://files.finestmakaticondo.com/uploads/1/3/1/4/131406800/4963317.pdf
    • http://files.oscarxavierdelsebastien.com/uploads/1/3/1/4/131437660/4103f.pdf
    • https://cdn.shopify.com/s/files/1/0428/7466/7164/files/238695628.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7570/files/muvebezenolemawonobefure.pdf
    • https://cdn.shopify.com/s/files/1/0430/3867/1010/files/velakuj.pdf
    • https://cdn.shopify.com/s/files/1/0441/3577/6408/files/wunupibix.pdf
    • https://cdn.shopify.com/s/files/1/0429/3355/1260/files/62128135183.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/45059254933.pdf
    • https://cdn.shopify.com/s/files/1/0435/3681/0135/files/gakuzobenarobigojunuje.pdf
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/gakiwunalepa.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/jazusoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/4165/9797/files/92107251180.pdf
    • https://cdn.shopify.com/s/files/1/0429/4151/3894/files/xejavatimemegalupazilafuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1588/files/85819376103.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_off00006aaa.bin
cc48cdb6124e8345351ff55bbb8836abdf7eb0d7335a00d01847c0a4125dfe92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAA 5696 bytes
font_01_sfnt_off00007e08.bin
79e404970c3a3d3ec8b17fdf0f214fd4261718cc87e1c72c1db387939b64f23a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E08 10380 bytes

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