Malicious PDF — malware analysis report

Static analysis result for SHA-256 a089f1dac4a3e6fc…

MALICIOUS

PDF

42.3 KB Created: 2020-08-15 15:33:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9338b59a06d07cefbc15610bb3d52ad8 SHA-1: 87ec2e7b5de0a185fcbe25aa3542d0d23b083c61 SHA-256: a089f1dac4a3e6fc030c32acb657245d814a165080064cfce616fe24aee267f2
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF link farm. The primary malicious link, https://ttraff.com/wb?keyword=aprendizagem%20significativa%20moreira%20pdf, is flagged as a redirector to known malicious infrastructure. The document body, though heavily obfuscated, also contains this URL, suggesting it is the intended lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential SEO manipulation or a broad distribution strategy.

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/wb?keyword=aprendizagem%20significativa%20moreira%20pdf
    • http://files.timhayes.org/uploads/1/3/0/7/130740112/julatowupujowa.pdf
    • http://files.rincon4school.com/uploads/1/3/0/8/130813796/fujiletiso.pdf
    • https://cdn.shopify.com/s/files/1/0435/3366/4420/files/27099184764.pdf
    • https://cdn.shopify.com/s/files/1/0434/7173/2889/files/86882032408.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/wupakar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pizegavegip.pdf
    • https://cdn.shopify.com/s/files/1/0429/5258/9465/files/kedadojig.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/89877876910.pdf
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/16092260862.pdf
    • https://cdn.shopify.com/s/files/1/0445/3695/5044/files/arifureta_light_novel_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0422/files/66853860512.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_off0000558a.bin
66a625bd831e9310c578126aa4d042ad4cf40ef4d697e4b7e5f6d45a830f9e98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x558A 5328 bytes
font_01_sfnt_off00006797.bin
b1aba30ba99e04bc5a9df1646bf2ca3bbd495f96b5252c0ef9f19419a2cc21f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6797 12260 bytes
font_02_sfnt_off00008cc7.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC7 4324 bytes

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