Malicious PDF — malware analysis report

Static analysis result for SHA-256 423701e093086369…

MALICIOUS

PDF

44.1 KB Created: 2020-08-30 23:40:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83408dd72035a19c285169525e210fb1 SHA-1: 329229e5f4036f0652a83abc4ee729d7e1a0f487 SHA-256: 423701e0930863691255e2a12a7891587b92244dce8250bc093ca7f025f8342f
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to a URL that appears to be a lure for a Huawei modem firmware update. The document body, though heavily obfuscated, contains fragments of this lure and embedded URLs. The presence of a link farm heuristic suggests this PDF is part of a larger SEO poisoning campaign designed to drive traffic to malicious sites.

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.cc/wix?keyword=mise+un+jour+firmware+modem+huawei+h
    • https://cdn.shopify.com/s/files/1/0439/1026/7035/files/fixovu.pdf
    • https://cdn.shopify.com/s/files/1/0440/1597/6613/files/computer_games_8_ball_pool.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/berasavajirip.pdf
    • https://static.usrfiles.com/ugd/b8c837_da641bfb739c4c13890db8ffbc1f5b1d.pdf
    • https://static.usrfiles.com/ugd/f3cb45_56de46a1bca349ab9ac184def88b7d97.pdf
    • https://static.usrfiles.com/ugd/b8c837_527e1dd520674f53a0cf9c4579a140c3.pdf
    • https://static.usrfiles.com/ugd/ae059d_e918247e73534acbbb216201def1d5cc.pdf
    • https://cdn.shopify.com/s/files/1/0430/1943/6185/files/36623144931.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7872/files/fagax.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/aprender_japones_basico.pdf
    • https://cdn.shopify.com/s/files/1/0432/9016/5403/files/gejaloba.pdf
    • https://cdn.shopify.com/s/files/1/0465/0575/4776/files/71112893496.pdf
    • https://cdn.shopify.com/s/files/1/0429/2391/7478/files/80379055650.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/33112907066.pdf
    • https://cdn.shopify.com/s/files/1/0433/4986/8703/files/govevogenazipegagigisal.pdf
    • https://cdn.shopify.com/s/files/1/0434/2359/6711/files/wordly_wise_book_7_lesson_3_answer_key.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/
    • https://cdn.shopify.com

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e8d.bin
b3e096fdd3d0a47ecc310d838acb52bb3b62049ef0d667f2bdeacb21fc8f2058		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8D 5288 bytes
font_01_sfnt_off00008072.bin
75361fcd62ae6f5698b6984c975bd8c012d91eb761942f03283ef1fd2b0973be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8072 10372 bytes

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