Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d12e663ea1b55ab…

MALICIOUS

PDF

41.9 KB Created: 2020-08-03 06:10:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4701d67af668d353f8f34885b27208dd SHA-1: f3f4964f4a2a43cc998c078a6b81f6b160db35ab SHA-256: 4d12e663ea1b55abd1fc304c9fd5d075345ae0c1e77f35ab419acb4d7e6b1c5b
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector link to 'https://ttraff.com/wb?keyword=spending%20habits%20of%20students%20research%20pdf'. Another critical heuristic identified a PDF link farm, suggesting a tactic to manipulate search engine results or distribute malicious content. The document body, though heavily obfuscated, contains the same suspicious URL, reinforcing the malicious intent.

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/wb?keyword=spending%20habits%20of%20students%20research%20pdf
    • http://files.newbeginningssanangelo.com/uploads/1/3/1/6/131606268/2311775.pdf
    • http://files.carolinastormhedgehogs.com/uploads/1/3/1/6/131637291/fanipewonosewagafuv.pdf
    • http://files.scouttrout.com/uploads/1/3/0/9/130969874/192e0d2308a.pdf
    • http://files.1ccauburn.org/uploads/1/3/0/7/130776645/mojudotewi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2809/3856/files/relumo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6114/8837/files/xulagetigugawemu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/gejudog.pdf
    • https://cdn.shopify.com/s/files/1/0437/2273/5767/files/zesakevopewawi.pdf
    • https://cdn.shopify.com/s/files/1/0441/0854/6200/files/sojuvekuwabusenupab.pdf
    • https://cdn.shopify.com/s/files/1/0433/4832/8603/files/negujinalekeromo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2022/1607/files/waxisatem.pdf
    • https://cdn.shopify.com/s/files/1/0428/9311/5548/files/nutosaboxawawugobulitor.pdf
    • https://cdn.shopify.com/s/files/1/0428/4206/3004/files/67986561892.pdf
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/xamuxepe.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/jakor.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_off0000659f.bin
1c2ddc01eefb45c5f8e64116496df75c717b22af492401e0f7eabc8fc7926170		 pdf-font-stream PDF embedded font (sfnt) at offset 0x659F 5628 bytes
font_01_sfnt_off000078bd.bin
10fe34484ecf997f0f9985ed3a38f597b9ea1eaf67171f6146d238e99ead12f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78BD 9924 bytes

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