Malicious PDF — malware analysis report

Static analysis result for SHA-256 e42ce1cb5302ea3d…

MALICIOUS

PDF

39.7 KB Created: 2020-08-22 05:03:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 005f8c9ca68abf2141b279697045a0d6 SHA-1: b5441254347b1d63172290b12bc6765671eb4649 SHA-256: e42ce1cb5302ea3d5375567c9f733ce292d16b6f0022e6d328678d3ebeeae545
128 Risk Score

Malware Insights

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

The PDF file contains numerous links, masquerading as an answer key, to a redirector service (ttraff.com). This indicates a phishing or social engineering attack aimed at directing users to malicious content. The presence of a "download button" heuristic further supports the social engineering pretext. No scripts were extracted from this sample.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=daffynition+decoder+answer+key+page+121
    • http://xupel.brunolovric.com/uploads/1/3/2/7/132740606/5931729.pdf
    • https://cdn.shopify.com/s/files/1/0447/9811/6006/files/wallpaper_city_guide_berlin_app.pdf
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/9369425324.pdf
    • https://cdn.shopify.com/s/files/1/0429/1995/2550/files/cet_2019_answer_key_mathematics.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/48186058753.pdf
    • https://cdn.shopify.com/s/files/1/0434/0849/0663/files/10627696630.pdf
    • https://cdn.shopify.com/s/files/1/0433/5442/3445/files/ledimupobojumuzitiweniviw.pdf
    • https://cdn.shopify.com/s/files/1/0431/4962/3462/files/namapijunopamakugigigij.pdf
    • https://cdn.shopify.com/s/files/1/0436/8692/0347/files/whatsapp_app_apk_new_version.pdf
    • https://cdn.shopify.com/s/files/1/0437/6988/8920/files/61045813552.pdf
    • https://cdn.shopify.com/s/files/1/0430/7868/0727/files/messenger_for_pc_win_10.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_off00005944.bin
2f7b00a9cb190e69af57c2875884cbb3b661af66df0aced012a16964e2936d13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5944 5732 bytes
font_01_sfnt_off00006d07.bin
f02551a0f8408b704b9da1bdf679b8253d0ee2c76eb77093c97fcc80bd734d69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D07 11016 bytes

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