Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b50619d7bc388b0…

MALICIOUS

PDF

45.0 KB Created: 2020-08-10 03:45:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b64e0274d94e79a5b92dd1dbc5b247d2 SHA-1: ecaa23315d7928d985cddf74b680b301cc560ab0 SHA-256: 5b50619d7bc388b05c6b2cb6a520e6f168fff024d710821df91099faacef6430
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to malicious infrastructure, disguised as a resource for reducing workplace stress. This indicates a phishing or social engineering attempt to lead the user to a harmful site. The presence of numerous external PDF links suggests a link farm used for SEO manipulation or to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=reducing+stress+in+the+workplace+pdf
    • http://files.jcfarming.co.uk/uploads/1/3/1/4/131453132/bivorakoropelag_vilivibuwe_sedobu_bewel.pdf
    • http://files.leemoremalka.com/uploads/1/3/0/7/130776542/6485280.pdf
    • http://files.heartlandjungians.org/uploads/1/3/0/7/130776841/ziniruper.pdf
    • http://files.growingmindsfarm.org/uploads/1/3/1/8/131871704/ralubuxudisogero.pdf
    • http://files.hotfootstompers.org/uploads/1/3/1/3/131397946/jexize.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2742/3654/files/6267835061.pdf
    • https://cdn.shopify.com/s/files/1/0427/7580/6119/files/70604397910.pdf
    • https://cdn.shopify.com/s/files/1/0429/6605/7116/files/hindi_item_songs.pdf
    • https://cdn.shopify.com/s/files/1/0432/7908/9824/files/54929072980.pdf
    • https://cdn.shopify.com/s/files/1/0432/2859/4336/files/wagisojamiwitovosenub.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8710/files/skin_cancer_detection_using_image_processing.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/jixexebivupikipusezekip.pdf
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/tuvufo.pdf
    • https://cdn.shopify.com/s/files/1/0427/4490/5884/files/29886048536.pdf
    • https://cdn.shopify.com/s/files/1/0435/6050/1407/files/1006580719.pdf
    • https://cdn.shopify.com/s/files/1/0436/0349/3028/files/jatonukej.pdf
    • https://cdn.shopify.com/s/files/1/0431/5181/8918/files/16357028699.pdf
    • https://cdn.shopify.com/s/files/1/0434/4119/3110/files/skripsi_tentang_peningkatan_hasil_belajar_menggunakan_media_audio_visual.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4414/files/zalodom.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007183.bin
53b038e87587cd38384399b29eefacb074fa0ec2e8ff055dc6e151373a7f6a9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7183 5580 bytes
font_01_sfnt_off00008496.bin
5d23863013710b377df8a1736e94b31c438648dc0826422b43d6683aac398701		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8496 9992 bytes

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