Malicious PDF — malware analysis report

Static analysis result for SHA-256 518f902fc3a0c374…

MALICIOUS

PDF

123.4 KB Created: 2020-08-11 15:57:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38cf42fbb20dd5a42880a07084954cf1 SHA-1: 54ec08045735d3b196c3552f695a9b8d66bbfe05 SHA-256: 518f902fc3a0c374a52b054b135ebebb5db93f5ad06cdcb1a0453970a8a867d5
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that matches the suspicious redirector. The PDF_SEO_LINK_FARM heuristic indicates a large number of generated links, suggesting a spam or phishing campaign. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.com/pify?keyword=bba+syllabus+ipu+pdf
    • http://kidom.adjectivenewmusic.com/uploads/1/3/1/4/131407005/wawifomuranogina.pdf
    • http://files.asaedirects.com/uploads/1/3/0/7/130739831/4478c9c6cd6013.pdf
    • http://files.lvjlawfirm.com/uploads/1/3/0/7/130740073/kawukexaretajuva.pdf
    • https://cdn.shopify.com/s/files/1/0437/4000/4501/files/aubade_poem.pdf
    • https://cdn.shopify.com/s/files/1/0429/3237/1622/files/78418086465.pdf
    • https://cdn.shopify.com/s/files/1/0437/6880/7586/files/form_i-_134_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0438/1537/0912/files/kusazaxupus.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8216/files/the_fall_of_rome_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/5045/8520/files/lewovononapepigojofirug.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6457/files/tomunovifivuxomiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/2157/4044/files/html5_editor.pdf
    • https://cdn.shopify.com/s/files/1/0432/9606/3643/files/zamesipujetolizi.pdf
    • https://cdn.shopify.com/s/files/1/0435/9825/0141/files/nurud.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/8723565370.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pesaveput.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/deridero.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017bd6.bin
c99de3310b5207c96b40d1434fc9b61a9246a8b2eea770969c33f19997959915		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17BD6 4696 bytes
font_01_sfnt_off00018bca.bin
7e52b91f45efbd60f8386c8d5820195659b10dfb9a160b3285b9d729c6283524		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18BCA 15916 bytes
font_02_sfnt_off0001bca3.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BCA3 16204 bytes
font_03_sfnt_off0001d1d1.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D1D1 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.