Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b773c1af60aee06…

MALICIOUS

PDF

52.2 KB Created: 2020-08-21 11:37:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 423b72a491db1e6353e67f8e39330c3d SHA-1: b08f6996cf8c9a2195c0e8761edaa80f4f1828a7 SHA-256: 3b773c1af60aee067a6b13bb7ec7745b2a173e384a34e10f10cfe290c8628d18
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to the redirector, suggesting a lure to external malicious content. The presence of numerous Shopify links, some of which are benign, indicates a link farm strategy to obscure the malicious destination. No scripts were extracted from this sample.

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/pify?keyword=chiari+malformation+prognosis+after+surgery
    • http://files.skinnytiffy.com/uploads/1/3/2/6/132695692/146128.pdf
    • http://rojarikuf.wilkins3.com/uploads/1/3/0/7/130739113/piwinudovikeke_raroko_wutip_pimedadod.pdf
    • http://fuzudiz.pillagerboosterclub.com/uploads/1/3/0/8/130873830/dusobemat.pdf
    • http://files.anjaliseries.com/uploads/1/3/0/7/130776327/kepapona_welipebuxef_wixuga.pdf
    • http://muribim.simongregory.info/uploads/1/3/1/0/131069934/vewubigupabaxo_basowesogapi_basupida.pdf
    • https://cdn.shopify.com/s/files/1/0432/1630/6344/files/cognitive_behavioral_therapy_techniques_for_depression.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/pipegomemopomu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5055/files/1284926614.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/65593277439.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/facebook_cover_video_free_template.pdf
    • https://cdn.shopify.com/s/files/1/0438/6412/9696/files/74391701765.pdf
    • https://cdn.shopify.com/s/files/1/0428/0179/1132/files/geometry_constructions_practice_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/tepixanurikutonodap.pdf
    • https://cdn.shopify.com/s/files/1/0435/0210/8836/files/xisutewuxubo.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_off00008d07.bin
e792dec467fdad29189a0fff41f0b5254e83489186dded6bd934bed2e435cdd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D07 5320 bytes
font_01_sfnt_off00009f04.bin
98204c4c08bef44722a141cb65e82ebabc0f82c9ec37ea2241acd989a65fc96c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F04 10616 bytes

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