Malicious PDF — malware analysis report

Static analysis result for SHA-256 d194429c571fe7b4…

MALICIOUS

PDF

39.8 KB Created: 2020-08-19 01:46:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa84396c3277424038d5ea52641f8bd5 SHA-1: 33d7b64c284519d7f14d9acf2e05108db26ec1c7 SHA-256: d194429c571fe7b45ec6455d6f65a2d2f125deb1547989f3a7308348020aa8ce
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=aggregate+crushing+value+lab+report+discussion'. Additionally, it features a link farm with numerous external PDF links, many hosted on Shopify, with one specific link to 'https://cdn.shopify.com/s/files/1/0430/7091/4717/files/mafibuwurix.pdf'. The document body, though heavily obfuscated, contains the redirector URL. The primary intent appears to be directing users to malicious infrastructure.

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.cc/pify?keyword=aggregate+crushing+value+lab+report+discussion
    • http://files.lakesideorchestra.com/uploads/1/3/0/7/130739232/gakadosunusigozidone.pdf
    • http://wizivozi.sweetchairendipity.com/uploads/1/3/0/8/130873927/sikuvezuguvub-robivuxizijop-wibolafirogi-ganow.pdf
    • http://xefijuzow.sdoster.com/uploads/1/3/1/6/131606289/segir_jugegi_kuluwukabezoto_zodajixa.pdf
    • https://cdn.shopify.com/s/files/1/0430/7091/4717/files/mafibuwurix.pdf
    • https://cdn.shopify.com/s/files/1/0432/5395/6758/files/bandar_seri_begawan_map.pdf
    • https://cdn.shopify.com/s/files/1/0439/6112/2974/files/technical_support_interview_questions_and_answers_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/2000/1178/files/maplestory_2_maple_guide_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/7526/4924/files/poxuzawutomugisatedevaba.pdf
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/berliner_platz_4.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wugituvunajobi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1796/9570/files/89905273692.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/najemad.pdf
    • https://cdn.shopify.com/s/files/1/0434/3031/4151/files/nomobedekar.pdf
    • https://cdn.shopify.com/s/files/1/0447/8812/1760/files/25703815183.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_off00005d54.bin
6a53f83ecd533c753c5515a571b23422ce676afc2df9930e1e7b09cb0b6d4a63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D54 5524 bytes
font_01_sfnt_off00007007.bin
155cc8a70877856563138b5ceb53a7e7d95da9a34547d1709135b30ea2106a60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7007 10168 bytes

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