Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa1f16b09a91783b…

MALICIOUS

PDF

53.8 KB Created: 2020-08-31 02:26:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a37545e59b5ad8aa9e4394811b94719 SHA-1: 2d088d563e6b46dfb23c4f40bf1321265d93aa64 SHA-256: aa1f16b09a91783be3f56630e1c1afb189f43c1457b0818c14a6e88a0ab0f78c
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF link farm. The primary malicious URL, https://ttraff.com/wix?keyword=john+f.+reynolds, is flagged as a known malicious redirector. The document body contains garbled text and what appears to be metadata from the wkhtmltopdf tool, suggesting it was programmatically generated to host these links.

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/wix?keyword=john+f.+reynolds
    • https://cdn.shopify.com/s/files/1/0431/5657/0266/files/90052473983.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/zitupapadudiredofovajik.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8752/files/brio_dinner_menu.pdf
    • https://cdn.shopify.com/s/files/1/0448/8734/3271/files/32233847595.pdf
    • https://cdn.shopify.com/s/files/1/0432/7574/7484/files/auxin_biosynthesis_pathway.pdf
    • https://cdn.shopify.com/s/files/1/0432/2931/5229/files/81703350197.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/should_shouldnt_exercises_agenda_web.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_cd0cbc3683ab4f46ba519ec3950210bc.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa232c00dec347458a860aaa1b17f07f.pdf
    • https://static.usrfiles.com/ugd/b8c837_857fd19f984e4c0fa702c7e3211b0246.pdf
    • https://cdn.shopify.com/s/files/1/0433/5920/7582/files/50815331128.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/eclipse_oxygen_64_bit_exe_file.pdf
    • https://cdn.shopify.com/s/files/1/0469/0296/8482/files/naruto_shippuden_apk_offline_game.pdf
    • https://cdn.shopify.com/s/files/1/0431/8009/7687/files/jopok.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_off000081a1.bin
115a90d5df7f1a08ec65c1c0c5eeb363e7af8e1ab5f7ad4c5866874c484625af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81A1 4568 bytes
font_01_sfnt_off00009116.bin
600e2c9bf2b89557bc84261a4677893e6abe9526b3ca165d19eb3070119fa775		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9116 14112 bytes
font_02_sfnt_off0000bceb.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCEB 4324 bytes

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