Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a9488bb85da77d7…

MALICIOUS

PDF

37.4 KB Created: 2020-08-19 09:33:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02855004ef71433ba0bcc6c6d6ad281c SHA-1: 76651072b4a3fbbc791a9c002c5770b890f1a636 SHA-256: 1a9488bb85da77d7b0d5aa4a3e6244755592a0d1df0024e671bf99e75e5a7417
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector link to 'ttraff.cc' which is known malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'Candy crush soda pc game' and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF also contains numerous links to Shopify-hosted PDFs, likely part of a link farm to improve search engine ranking for malicious content.

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.cc/pify?keyword=candy+crush+soda+pc+game
    • http://files.jadsys.com/uploads/1/3/0/8/130814110/3023938.pdf
    • https://cdn.shopify.com/s/files/1/0436/2554/5890/files/62295296904.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/53234310014.pdf
    • https://cdn.shopify.com/s/files/1/0433/1284/0862/files/zigupazinavebekapa.pdf
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/95170735195.pdf
    • https://cdn.shopify.com/s/files/1/0435/9713/6030/files/80348712834.pdf
    • https://cdn.shopify.com/s/files/1/0432/6513/0658/files/panchatantra_stories_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4575/6821/files/97160098554.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/76892145528.pdf
    • https://cdn.shopify.com/s/files/1/0438/5318/5174/files/45403802830.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8723/files/sunetabejuvofus.pdf
    • https://cdn.shopify.com/s/files/1/0440/0106/7166/files/73219039688.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_off00005616.bin
1e6a08f942aea591e0c541bd4e77972a85bf3241c841069c1601fb416bb122ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5616 5460 bytes
font_01_sfnt_off0000687d.bin
1ffa72d860f96548250b95a8ed864e3a733a776ee48af51d06dd6e9676b9b928		 pdf-font-stream PDF embedded font (sfnt) at offset 0x687D 9648 bytes

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