Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a1d2e8071ac3388…

MALICIOUS

PDF

42.4 KB Created: 2020-08-09 05:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03f333bf0595dee1c5bae2a8f2093d64 SHA-1: ef78b45338e3a9a059deff3b864b55689413bb65 SHA-256: 8a1d2e8071ac3388e107fded1e78c897e678aa1d18ef085672d699ebe03f4e8c
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. The document body is heavily obfuscated and appears to be generated content, likely to mask the malicious intent of the embedded links. The primary goal seems to be SEO manipulation or redirecting users to malicious content via the link farm.

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=b+tree+insertion+and+deletion+pdf
    • http://files.fx-toprebates.com/uploads/1/3/0/8/130813796/dalozadose.pdf
    • http://files.umcow.org/uploads/1/3/1/8/131856125/6998459.pdf
    • http://vivezaji.rbef.tv/uploads/1/3/1/3/131398140/nekibu-xijapavujatot-gevuvix-wilefif.pdf
    • https://cdn.shopify.com/s/files/1/0430/1671/6437/files/71179216562.pdf
    • https://cdn.shopify.com/s/files/1/0432/9563/7659/files/91146664332.pdf
    • https://cdn.shopify.com/s/files/1/0428/6405/0332/files/pemupazunixupexogujisos.pdf
    • https://cdn.shopify.com/s/files/1/0434/1153/8072/files/alimentacion_complementaria_oms_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/5349/0071/files/zokawelu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46905239833.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/51386976831.pdf
    • https://cdn.shopify.com/s/files/1/0437/1028/3931/files/nivufigetazali.pdf
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/fomod.pdf
    • https://cdn.shopify.com/s/files/1/0438/9001/6424/files/ableton_live_9_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/4066/7810/files/3._5_character_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/1019/5605/files/15102544560.pdf
    • https://cdn.shopify.com/s/files/1/0438/3545/7696/files/94019416490.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_off00005f52.bin
2158f3761618a85f6df8a7a63b12d4e095d9f6ccb6d37d01c9a016df086f72f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F52 5084 bytes
font_01_sfnt_off000070a9.bin
2f3f1f611c42e5d8da8b311d933ace7ee0515b0cc177bc51b5e3b62e7549de97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70A9 13856 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.