Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6710fb86780df8d…

MALICIOUS

PDF

40.3 KB Created: 2020-08-20 10:48:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06e41973e9ed3ea7024f64e6c70218b5 SHA-1: ad5aefb7377fc34c8a6dac11df6c5d06a84ad582 SHA-256: d6710fb86780df8db0fb1f624ea66ac51fb4f7084460e07870d2c17967e241a3
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic firings indicate a PDF link farm, suggesting the document's primary purpose is to distribute links, potentially for SEO manipulation or to lead users to malicious sites. The ML classifier strongly supports the malicious nature of this PDF.

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=font+aksara+jawa+untuk+word
    • http://files.thedumplinglady.com/uploads/1/3/1/6/131607075/tixujumag.pdf
    • https://cdn.shopify.com/s/files/1/0434/7723/7920/files/captive_prince_short_stories.pdf
    • https://cdn.shopify.com/s/files/1/0429/6507/4086/files/muxuvum.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/japuni.pdf
    • https://cdn.shopify.com/s/files/1/0436/0303/4276/files/cwss_fallout_4.pdf
    • https://cdn.shopify.com/s/files/1/0431/1888/7073/files/drawing_contour_lines_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/7261/8657/files/65192096764.pdf
    • https://cdn.shopify.com/s/files/1/0432/9593/2574/files/50059157097.pdf
    • https://cdn.shopify.com/s/files/1/0432/5428/4450/files/wewaposikanakivituz.pdf
    • https://cdn.shopify.com/s/files/1/0427/9920/2467/files/vifesizaxoriserinun.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9115/files/28409709700.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_off00005bf2.bin
5731e0de4b3db70e7fb9e4896e014a934c2bb02814ad000405f63c8e01f50a8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF2 4972 bytes
font_01_sfnt_off00006cfe.bin
1584194236e4dbd8551b66b18cf15b28f961eda57417dfe5ace09f7820111d3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFE 11872 bytes

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