Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a83abd239cb9788…

MALICIOUS

PDF

44.9 KB Created: 2020-08-14 22:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 647e792f3660b232633e17df472a38cc SHA-1: 086f3ab7732e9f6c23fb5e078d3e3e4108e7dbc4 SHA-256: 3a83abd239cb9788831a0e9127309c0a3f91dc7e01bb25aceae1e2f0db907798
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, with a critical heuristic identifying it as a link farm designed to redirect users. One of the primary links, 'https://ttraff.com/wb?keyword=jurnal%20organogenesis%20pdf', is flagged as malicious. The document body, though heavily obfuscated, contains this URL, suggesting the intent is to trick users into visiting malicious sites under the guise of accessing a journal PDF.

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=jurnal%20organogenesis%20pdf
    • http://files.russianguideservice.com/uploads/1/3/2/3/132303170/xikazatuwexutom.pdf
    • http://files.pinetreechalet.ca/uploads/1/3/1/6/131636654/653e00e.pdf
    • https://cdn.shopify.com/s/files/1/0440/6280/2085/files/pokal.pdf
    • https://cdn.shopify.com/s/files/1/0433/5380/0859/files/ponikixog.pdf
    • https://cdn.shopify.com/s/files/1/0435/2645/5455/files/53791181917.pdf
    • https://cdn.shopify.com/s/files/1/0435/8576/5535/files/15955099591.pdf
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/30046195755.pdf
    • https://cdn.shopify.com/s/files/1/0430/1701/1353/files/56993700345.pdf
    • https://cdn.shopify.com/s/files/1/0430/7510/9013/files/mikewupevijupibo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3290/3833/files/xekolepufi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5021/2264/files/winchester_reloading_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/7215/0947/files/puccini_o_mio_babbino_caro.pdf
    • https://cdn.shopify.com/s/files/1/0447/4021/4940/files/accidentally_in_love_piano.pdf
    • https://cdn.shopify.com/s/files/1/0436/1024/3230/files/98539794338.pdf
    • https://cdn.shopify.com/s/files/1/0437/7945/7173/files/dodurev.pdf
    • https://cdn.shopify.com/s/files/1/0432/0365/7887/files/41380294769.pdf
    • https://doi.org/10.19027/jai.4.197-204
    • 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_off000065ef.bin
87ea005f7375bcd882ef8b0654f7a64dd2b53f26f7128fe44551ae1643d0456f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65EF 5200 bytes
font_01_sfnt_off000077a9.bin
288b7ae2a9ce85ccdd28472753688f250ba190e87ca71ea6c797a1ab86c06420		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A9 14976 bytes

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