Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8c6cfef2eda9dd7…

MALICIOUS

PDF

52.8 KB Created: 2020-07-30 22:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e973db53db8c5e72942fcd75d9a0fc2 SHA-1: ceb2a1766768f5de6fd031ad2fbb3da6534c2cbd SHA-256: a8c6cfef2eda9dd79fb1c588cf4e195a4942edd527f191dff7037addd124f569
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to "agricultural engineering project ideas pdf" and metadata suggesting it was generated by wkhtmltopdf. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or exploits.

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=agricultural+engineering+project+ideas+pdf
    • http://files.nebraskansunitedforthegoodlife.net/uploads/1/3/0/7/130776409/tikivog-gazevi.pdf
    • http://files.learnguitar4fun.com/uploads/1/3/1/8/131856381/8522082.pdf
    • http://files.3blossomscafe.com/uploads/1/3/1/4/131453904/gituragogan.pdf
    • http://files.theexchangepaperie.com/uploads/1/3/1/8/131871692/misumolis.pdf
    • http://files.3blossoms
    • https://cdn.shopify.com/s/files/1/0428/0041/4883/files/rukaxovafubudowu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/36997202947.pdf
    • https://cdn.shopify.com/s/files/1/0433/8722/4214/files/nixodebefuwobijen.pdf
    • https://cdn.shopify.com/s/files/1/0429/2716/1507/files/82538388136.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6269/files/1748976071.pdf
    • https://cdn.shopify.com/s/files/1/0435/8298/0259/files/gudefedemovidadepudopekif.pdf
    • https://cdn.shopify.com/s/files/1/0433/9892/2392/files/tawudowaramam.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9058/files/vuzisosisigulu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9585/8088/files/70104614211.pdf
    • https://cdn.shopify.com/s/files/1/0440/2275/9582/files/21577087669.pdf
    • https://cdn.shopify.com/s/files/1/0435/9018/9219/files/5673609308.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/ziduritap.pdf
    • https://cdn.shopify.com/s/files/1/0439/1796/7528/files/xaputapeg.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_off0000905c.bin
8961eef336d47cc9ffb329b994cc56901610100d077011ab9d4be6d407772cc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x905C 5268 bytes
font_01_sfnt_off0000a255.bin
79732fee66fcbcd22e8baeea765f51cbb2b2b9a2d0c1d7ec7acb77cff10dc5d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA255 10276 bytes

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