Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3a9665efc9a5a8e…

MALICIOUS

PDF

33.8 KB Created: 2020-08-18 14:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a48f9f0e67d2dc8ffbba11c036c299b SHA-1: 1cb517ecb7a2eebda9d9018027eb7457eba4b28e SHA-256: b3a9665efc9a5a8e48d393c35aff8470cf8012a3e2d1bb67d7acd8ed275bd66f
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, disguised as a Halloween word search worksheet. The PDF also contains a large number of external links, many hosted on Shopify, which is indicative of a link farm used for SEO poisoning or to obscure malicious destinations. The primary malicious URL identified is ttraff.com, which is used in conjunction with a keyword suggesting a benign document.

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=halloween+word+search+worksheet
    • http://jazarabif.ccioh.com/uploads/1/3/2/7/132712615/3466379.pdf
    • https://cdn.shopify.com/s/files/1/0434/2621/8134/files/kuzapikidapekaxalevira.pdf
    • https://cdn.shopify.com/s/files/1/0437/9390/7869/files/tutokenatijesarixux.pdf
    • https://cdn.shopify.com/s/files/1/0429/6661/4175/files/lopezomakikavuresubaruma.pdf
    • https://cdn.shopify.com/s/files/1/0433/4046/4281/files/84641892080.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78649322563.pdf
    • https://cdn.shopify.com/s/files/1/0437/5930/4865/files/zuwufijujiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/zokoruwelovedinewatimir.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/71482320097.pdf
    • https://cdn.shopify.com/s/files/1/0430/5397/3657/files/epithelial_tissue_chart_answers.pdf
    • https://cdn.shopify.com/s/files/1/0441/2263/6440/files/alkanes_and_cycloalkanes.pdf
    • https://cdn.shopify.com/s/files/1/0431/8937/1040/files/6708971186.pdf
    • https://cdn.shopify.com/s/files/1/0432/9167/2736/files/xinimow.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8573/files/what_does._com_mean.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/67673109167.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_off0000471b.bin
ee934405c153e1057eb77e0b9417cf359b3d8da0caf25445492e0253e2765367		 pdf-font-stream PDF embedded font (sfnt) at offset 0x471B 5144 bytes
font_01_sfnt_off0000589b.bin
b7367d3ba90fa01fc769ba33e533505d53de4b580f7741aa14990bea711c3493		 pdf-font-stream PDF embedded font (sfnt) at offset 0x589B 9856 bytes

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