Malicious PDF — malware analysis report

Static analysis result for SHA-256 8912a2fe4db22a19…

MALICIOUS

PDF

41.4 KB Created: 2020-09-04 00:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8308cf4ee35ac4e2cadc857ea171b8ec SHA-1: 71757248b88b501a7a07d7f697e196008156e329 SHA-256: 8912a2fe4db22a19286f07f9502a31c4c7e03e665024ddb0010cc223c4436b0f
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 a URL that promises '8 ball pool free rewards apk'. This URL is the primary indicator of malicious intent. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous other PDF files, many hosted on Shopify. The document body, though heavily obfuscated, also contains the malicious URL, reinforcing the lure. The combination of these factors strongly suggests a social engineering attack aimed at tricking users into visiting a malicious site.

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.club/wix?keyword=8+ball+pool+free+rewards+apk
    • https://cdn.shopify.com/s/files/1/0427/6905/5911/files/miwesawilono.pdf
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/when_we_dead_awaken_adrienne_rich.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9477/files/vuxowolasivezupimidepapis.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/natops_manuals_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1326/files/muluvusepuziwudaka.pdf
    • https://static.usrfiles.com/ugd/dd4472_2ec0f62e6a6a4731b20213b7dd51ad07.pdf
    • https://static.usrfiles.com/ugd/b8c837_7edd44ac085d4c6fa20bd1fb0a4a616f.pdf
    • https://static.usrfiles.com/ugd/338562_473794e70cb24f47b9d4bfd24c06972c.pdf
    • https://static.usrfiles.com/ugd/e1a791_3b5113f2b0584e7f9c291141ab66a75a.pdf
    • https://static.usrfiles.com/ugd/b8c837_603c1f8d26f5401094174002416790d5.pdf
    • https://static.usrfiles.com/ugd/5438e3_3277e14725a847dc91c0a81e05d92be9.pdf
    • https://static.usrfiles.com/ugd/b8c837_a8679ef925f6435684dc6b9c5758c7d9.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0201/files/canadian_citizenship_study_questions_answers_2019.pdf
    • https://cdn.shopify.com/s/files/1/0436/2282/6142/files/nafuxosifewisisawaxa.pdf
    • https://cdn.shopify.com/s/files/1/0429/4678/9542/files/weketudupepabik.pdf
    • https://cdn.shopify.com/s/files/1/0447/8684/3799/files/fofafim.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_off0000615f.bin
18bf6405925797d70b842ad903c46e140f695af3c9400c34eba6fbe4c48c8fb5
pdf-font-stream PDF embedded font (sfnt) at offset 0x615F 5432 bytes
font_01_sfnt_off000073f5.bin
c9ceeaf35e9ed0e913c8f8c74901ca2f0dfffbf0fccdcc845485dd76f835a7e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x73F5 10740 bytes