Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4b2aa670d0f1b71…

MALICIOUS

PDF

49.6 KB Created: 2020-09-05 04:37:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6765e6409518a05a619df8ae6f79579 SHA-1: f3317b99c2e118995f7b29fdb28b3a947418e7fa SHA-256: e4b2aa670d0f1b714eaba080ee9161ad27a224091a9627e9c92ec149ff18c980
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with a critical heuristic firing indicating a malicious redirector link. The primary malicious URL identified is https://ttraff.me/wix?keyword=astm+a240%252F+a240m+pdf, which likely serves as a gateway to further malicious content. The document body, though heavily obfuscated, also contains this URL and other benign-looking Shopify links, suggesting a link farm or SEO poisoning tactic to distribute the malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.me/wix?keyword=astm+a240%252F+a240m+pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/43650165575.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/livoxigugefeguvon.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3590/files/c_split_string_by_comma.pdf
    • https://static.usrfiles.com/ugd/b8c837_202350c6c4b54632af88f8da9d74f51a.pdf
    • https://static.usrfiles.com/ugd/f95141_d8a620fb915d40f5b306862b7d7fdc1c.pdf
    • https://cdn.shopify.com/s/files/1/0428/5097/5910/files/32733729529.pdf
    • https://cdn.shopify.com/s/files/1/0436/5680/6553/files/71629405229.pdf
    • https://cdn.shopify.com/s/files/1/0438/4089/7181/files/bpsc_65th_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0433/1402/0505/files/99970622665.pdf
    • https://static.usrfiles.com/ugd/b8c837_052f2125847e49058c83956fdea2c9cd.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa0ba7b175c2460bb63e320da8ee3f53.pdf
    • https://static.usrfiles.com/ugd/bfbc46_aad265da7cf04ffd8d859f61dfa858aa.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_off00005f1c.bin
c9a8c5ee39bea79843492078b61ff13602a2e7cbcdf5e18fe571a94551d86b24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1C 5448 bytes
font_01_sfnt_off000071a3.bin
227bb335fb6be8f28ee6632696e27ffd778aa3b595fd02ddd78f8596c381fa9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71A3 14920 bytes
font_02_sfnt_off0000a084.bin
a858ad06ee9285ef990c8ccf5509e6bce71cae8afc7f99ba8a1dcaf33198b628		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA084 16684 bytes

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