Malicious PDF — malware analysis report

Static analysis result for SHA-256 9508eb1169c296f7…

MALICIOUS

PDF

39.2 KB Created: 2020-08-21 14:41:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9615b27eed941df45dd7c2a9f709d1dc SHA-1: 70e416790521f6b741780c5ab3eba57a9ac444eb SHA-256: 9508eb1169c296f7311e6a8796821b3771e5a55c244b8c08d3deb607575eacd8
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link to a redirector URL, which is a common tactic for delivering malicious payloads. The document body, though heavily obfuscated, contains the text "Megaer error bandwidth limit exceeded" and the malicious URL, suggesting a lure to trick the user into clicking the link. The presence of a link farm further indicates an attempt to obscure the final destination and potentially engage in SEO poisoning. No scripts were extracted from this sample.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=megaer+error+bandwidth+limit+exceeded
    • http://sedifaw.mychoice-thefilm.com/uploads/1/3/1/4/131408024/xejitu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0352/files/23122684667.pdf
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/biganuko.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3344/files/turuwipopinenogameb.pdf
    • https://cdn.shopify.com/s/files/1/0452/1410/5760/files/bulletin_de_salaire_2018.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51098187394.pdf
    • https://cdn.shopify.com/s/files/1/0443/5450/2812/files/comparative_balance_sheet_of_reliance_company.pdf
    • https://cdn.shopify.com/s/files/1/0434/0708/1622/files/space_engineers_thruster_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39858795743.pdf
    • https://cdn.shopify.com/s/files/1/0429/7008/7587/files/najajajoxosekugavutolesum.pdf
    • https://cdn.shopify.com/s/files/1/0437/2309/6216/files/anonymous_movie_2016_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0167/files/lusekuvavexegerizibi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/2004/files/adobe_reader_download_for_windows_8._1.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_off0000592a.bin
5ca7bccf4fc489b262d6dd5955ebce494ebf840fd63c983f7675b96ce1347b41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x592A 5480 bytes
font_01_sfnt_off00006bbc.bin
839a6a752ab7ebb0ae565ee65ac0fdf624f683d3c858092ea4926104e40a3d69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBC 10720 bytes

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