Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f51574d1984cea1…

MALICIOUS

PDF

59.6 KB Created: 2020-08-23 05:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e15f4ea68c3cfcd387f0a126b1b7c4b3 SHA-1: 5db11fc642abc544958ce8ac0158d74c6ff22ddd SHA-256: 3f51574d1984cea1f04b949ffb6f95c3d678d38106538f78b7bd03fec90c3d06
130 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for downloading content. The presence of a 'download button' heuristic further supports the social engineering aspect of this attack. The primary malicious URL identified is https://ttraff.com/pify?keyword=toefl+model+question+paper.

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=toefl+model+question+paper
    • http://befixar.elrepco.com/uploads/1/3/1/1/131164250/206976.pdf
    • http://befixar.elrepco.com/uplo
    • https://cdn.shopify.com/s/files/1/0431/7016/8986/files/91318935417.pdf
    • https://cdn.shopify.com/s/files/1/0429/4079/2999/files/instagram_followers_server.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/xerodeduvax.pdf
    • https://cdn.shopify.com/s/files/1/0430/1216/1685/files/doubles_addition_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0462/9531/8689/files/marital_settlement_agreement_template_pennsylvania.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/filokide.pdf
    • https://cdn.shopify.com/s/files/1/0430/2913/5514/files/2310958024.pdf
    • https://cdn.shopify.com/s/files/1/0433/0265/0020/files/6283533852.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/62864576952.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_off0000a142.bin
1377563f63282aae156405888e38f1bb78f8ca9d9c088d8895da2b4932fb70fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA142 5260 bytes
font_01_sfnt_off0000b309.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB309 1800 bytes
font_02_sfnt_off0000bb97.bin
a8fc6ce572183ac99ae2aa3a4776aa9ad84d7c0b41d2635e31042945312134b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB97 11092 bytes

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