Malicious PDF — malware analysis report

Static analysis result for SHA-256 8056b72b27d46e8e…

MALICIOUS

PDF

36.6 KB Created: 2020-08-05 03:35:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01c744f981e2cac47996aa5004ed4940 SHA-1: 2eed6eba61843591a91f13c505dc3867c0fd6b0f SHA-256: 8056b72b27d46e8e4ad973ceeeb42f20d8a6c6dcc055c65e2ce12fa005301284
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link pointing to ttraff.com, which is associated with known malicious infrastructure. The document body, though heavily obfuscated, contains the same URL, suggesting a lure for users to download content. The presence of numerous external PDF links further indicates a link farm or SEO poisoning tactic.

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.com/pify?keyword=data+structure+and+algorithm+tutorial+pdf+download
    • http://files.mrsdawson-classroom.com/uploads/1/3/1/3/131380213/82ad8784c19aade.pdf
    • http://files.pureheartbody.com/uploads/1/3/1/1/131163533/1f9512bd.pdf
    • http://files.woodlandpeaks.org/uploads/1/3/1/4/131453247/cb12869e077bb8c.pdf
    • https://cdn.shopify.com/s/files/1/0433/9436/7649/files/jetonidatatisefoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/letowopebofowebizuwir.pdf
    • https://cdn.shopify.com/s/files/1/0434/1065/3338/files/toxawezuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/5254/7739/files/5713000701.pdf
    • https://cdn.shopify.com/s/files/1/0436/1024/3229/files/19621753961.pdf
    • https://cdn.shopify.com/s/files/1/0437/9072/9377/files/15914979835.pdf
    • https://cdn.shopify.com/s/files/1/0431/8478/3509/files/wavafidakatilef.pdf
    • https://cdn.shopify.com/s/files/1/0429/9243/5359/files/56728208800.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38138836364.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93861148098.pdf
    • https://cdn.shopify.com/s/files/1/0433/5714/3205/files/mipigibi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0595/8553/files/node_js_socket_io_client.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_off0000447e.bin
aa0b2e0b3973ec43ede53e18766451c69bccf9926c198586abb28bd872f49a95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x447E 5540 bytes
font_01_sfnt_off00005735.bin
a253e7b9f02da6de4920755d40344b2080c3e8f0d0344930354bc86fdedf25c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5735 9236 bytes
font_02_sfnt_off000076d6.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76D6 4324 bytes

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