Malicious PDF — malware analysis report

Static analysis result for SHA-256 389cdd15f16249d3…

MALICIOUS

PDF

47.5 KB Created: 2020-08-29 23:43:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ece05a97a6a4c1c1167e0e6e8f0b1f0 SHA-1: 4b5652f129e5542e23ac931887ca46984978603d SHA-256: 389cdd15f16249d34e2fd4d6571e44592870a42fcb915182cc2213a6f85deede
120 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with one critical link pointing to a known malicious redirector. The document body text, though heavily obfuscated, includes the URL "https://ttraff.cc/wix?keyword=post+marketing+surveillance+pdf", suggesting a lure to trick users into visiting a malicious site. The presence of numerous benign-looking PDF links hosted on Shopify is likely a tactic to blend in with legitimate content.

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/wix?keyword=post+marketing+surveillance+pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1025/files/jovuteru.pdf
    • https://cdn.shopify.com/s/files/1/0434/2241/7047/files/learn_beginner_spanish_bundle.pdf
    • https://cdn.shopify.com/s/files/1/0432/2741/4696/files/tosade.pdf
    • https://cdn.shopify.com/s/files/1/0439/2851/8824/files/nunijasujowadulebojo.pdf
    • https://cdn.shopify.com/s/files/1/0438/1078/3394/files/xadigirejaliros.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad1079afa80c4c25826d0e7217647edd.pdf
    • https://cdn.shopify.com/s/files/1/0429/9007/6067/files/bisizajovasakoxuxikoje.pdf
    • https://cdn.shopify.com/s/files/1/0433/2548/9305/files/cellular_respiration_pogil_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0430/9732/5732/files/heap_income_guidelines_california.pdf
    • https://cdn.shopify.com/s/files/1/0428/4294/7750/files/nerobetejapikowevapi.pdf
    • https://cdn.shopify.com/s/files/1/0461/1201/4500/files/diamond_ft_fally_inama_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0437/4714/7925/files/69655946761.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96672573922.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_off00007a39.bin
9b9821b0b8b17b1e5000c2eedafbbadce47cb60fd459e633fa664f6151c80cfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A39 5600 bytes
font_01_sfnt_off00008d3b.bin
c6fad919ec761b7b3d404e89e4214f5642f9983651925c0c3372e8ddd673d939		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D3B 10516 bytes

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