Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfaccabf111bcbbc…

MALICIOUS

PDF

43.2 KB Created: 2020-08-06 15:17:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88ca6a13c3c258a3e85f320175fc896c SHA-1: 9bf45ed30d6ff28b81dc91f0483c9b6cab2bec27 SHA-256: bfaccabf111bcbbcf7af01209c1a703e8ed4a74247001237ce7fad22605210a4
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which are hosted on Shopify domains but appear to be part of a link farm. One critical heuristic identified a link to a known malicious redirector at `https://ttraff.ru/wb?keyword=instalacion%20de%20cateter%20venoso%20central%20periferico%20pdf`. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect users to malicious sites.

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.ru/wb?keyword=instalacion%20de%20cateter%20venoso%20central%20periferico%20pdf
    • http://files.thislittlepiggyminis.com/uploads/1/3/1/6/131636988/667731e18.pdf
    • http://files.sonyafilman.com/uploads/1/3/1/3/131383698/dodosedebawasesomu.pdf
    • http://files.sarahbanning.com/uploads/1/3/0/7/130775950/xufejedewubo-tiruvexoraru-zetiv-bijamunif.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/82679502643.pdf
    • https://cdn.shopify.com/s/files/1/0436/7699/1653/files/70851560495.pdf
    • https://cdn.shopify.com/s/files/1/0437/7896/5656/files/23752886960.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/cinderella_solution_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/4381/4560/files/14398885544.pdf
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/26244062600.pdf
    • https://cdn.shopify.com/s/files/1/0433/5042/5753/files/jojopiborizozax.pdf
    • https://cdn.shopify.com/s/files/1/0431/0827/0244/files/tuxumozudurarekuxenez.pdf
    • https://cdn.shopify.com/s/files/1/0436/4494/4542/files/harold_kerzner_project_management_11th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/26982909333.pdf
    • https://cdn.shopify.com/s/files/1/0430/0472/3349/files/riniwifusekipuvelar.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_off0000683f.bin
8fe0ff90078297a0cd3bf5db5fca1b537590dd5abb5b5b6bd1299423f6f8c393		 pdf-font-stream PDF embedded font (sfnt) at offset 0x683F 5144 bytes
font_01_sfnt_off000079d9.bin
b766c06092ec3d8bec7c74c2f22efb13182d9578b7ed457bf0ce97b0b19024ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79D9 10948 bytes

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